Identifying domains for evaluation during transaction processing

1. A method, comprising:

receiving, at a computer system, transaction details for a transaction between a transacting user and a receiving user, wherein the transaction details are received via a computing device of the receiving user based on initiation of the transaction by the transacting user, and wherein the transaction details include a set of one or more transaction uniform resource locators (URLs);

receiving, at the computer system from a browser of a computing device of the transacting user that is used to initiate the transaction, URL referrer information that indicates a referring URL for the transaction, wherein the URL referrer information is received based on an initiation of the transaction and prior to the transaction completing, and wherein the referring URL for the transaction is not an originating URL for the transaction;

determining, based on the set of URLs and the URL referrer information, that a proxy domain is being used for the transaction, wherein the proxy domain is not a same domain via which the transacting user originally initiated the transaction;

responsive to determining that the proxy domain is being used, the computer system generating a proxy domain risk score for the transaction, wherein the proxy domain risk score is based on proxy domain risk information comprising one or more of an age of the proxy domain, a location corresponding to the proxy domain, registration information for the proxy domain, IP address reputation information, or domain blacklist information;

determining, by the computer system, whether the proxy domain risk score satisfies a risk threshold; and

based on whether the proxy domain risk score satisfies the risk threshold, the computer system determining whether to block completion of the transaction.

2. The method of claim 1 , further comprising:

acquiring, from one or more third party computer systems, the proxy domain risk information, wherein at least a portion of the proxy domain risk information is acquired after the transaction is initiated by the transacting user.

3. The method of claim 1 , wherein the registration information for the proxy domain comprises a name of a registrant.

4. The method of claim 1 , wherein the location corresponding to the proxy domain comprises a geographic area of a computer system used for network functions of the proxy domain.

5. The method of claim 1 , further comprising:

determining that the proxy domain risk score does not satisfy the risk threshold, and in response, blocking completion of the transaction.

6. The method of claim 1 , further comprising:

based on determining that the proxy domain risk score satisfies the risk threshold, permitting completion of the transaction; and

transmitting, to the computing device of the receiving user, an indication that the transaction was successfully completed.

7. The method of claim 1 , wherein the set of transaction URLs includes a return URL to which the browser of the transacting user is to be directed upon completion of the transaction.

8. The method of claim 1 , wherein the set of transaction URLs includes a cancelation URL to which the browser of the transacting user is to be directed if the transaction is canceled.

9. A non-transitory computer-readable medium having stored thereon instructions executable by a computer system to cause the computer system to perform operations comprising:

receiving transaction details for a transaction between a transacting user and a receiving user, wherein the transaction details are received via a computing device of the receiving user based on initiation of the transaction by the transacting user, and wherein the transaction details include a set of one or more transaction uniform resource locators (URLs);

receiving, from a browser of a computing device of the transacting user that is used to initiate the transaction, URL referrer information that indicates a referring URL for the transaction, wherein the URL referrer information is received based on an initiation of the transaction and prior to the transaction completing, and wherein the referring URL for the transaction is not an originating URL for the transaction;

determining, based on the set of URLs and the URL referrer information, that a proxy domain is being used for the transaction, wherein the proxy domain is not a same domain via which the transacting user originally initiated the transaction;

responsive to determining that the proxy domain is being used, generating a proxy domain risk score for the transaction, wherein the proxy domain risk score is based on proxy domain risk information comprising one or more of an age of the proxy domain, a location corresponding to the proxy domain, registration information for the proxy domain, IP address reputation information, or domain blacklist information;

determining whether the proxy domain risk score satisfies a risk threshold; and

based on whether the proxy domain risk score satisfies the risk threshold, determining whether to block completion of the transaction.

10. The non-transitory computer-readable medium of claim 9 , wherein the operations further comprise:

acquiring, from one or more third party computer systems, the proxy domain risk information, wherein at least a portion of the proxy domain risk information is acquired prior to the transaction being initiated by the transacting user.

11. The non-transitory computer-readable medium of claim 9 , wherein the registration information for the proxy domain comprises registrant contact information comprising at least one of a mailing address, an email address, or a telephone number.

12. The non-transitory computer-readable medium of claim 9 , wherein the operations further comprise:

based on the proxy domain risk score, determining whether to flag the transaction for review.

13. The non-transitory computer-readable medium of claim 9 , wherein the proxy domain risk score is higher when the age of the proxy domain is below a threshold amount of time.

14. The non-transitory computer-readable medium of claim 9 , wherein the set of transaction URLs includes a return URL to which the browser of the transacting user is to be directed upon completion of the transaction.

15. A computer system, comprising:

a processor; and

a non-transitory computer-readable medium having stored thereon instructions executable by the computer system to cause the computer system to perform operations comprising:

receiving transaction details for a transaction between a transacting user and a receiving user, wherein the transaction details are received via a computing device of the receiving user based on initiation of the transaction by the transacting user, and wherein the transaction details include a set of one or more transaction uniform resource locators (URLs);

receiving, from a browser of a computing device of the transacting user that is used to initiate the transaction, URL referrer information that indicates a referring URL for the transaction, wherein the URL referrer information is received based on an initiation of the transaction and prior to the transaction completing, and wherein the referring URL for the transaction is not an originating URL for the transaction;

determining, based on the set of URLs and the URL referrer information, that a proxy domain is being used for the transaction, wherein the proxy domain is not a same domain via which the transacting user originally initiated the transaction;

responsive to determining that the proxy domain is being used, generating a proxy domain risk score for the transaction, wherein the proxy domain risk score is based on proxy domain risk information comprising one or more of an age of the proxy domain, a location corresponding to the proxy domain, registration information for the proxy domain, IP address reputation information, or domain blacklist information;

determining whether the proxy domain risk score satisfies a risk threshold; and

based on whether the proxy domain risk score satisfies the risk threshold, determining whether to block completion of the transaction.

16. The computer system of claim 15 , wherein the operations further comprise:

acquiring, from one or more third party computer systems, the proxy domain risk information, wherein at least a portion of the proxy domain risk information is acquired prior to the transaction being initiated by the transacting user.

17. The computer system of claim 15 , wherein the operations further comprise:

based on the proxy domain risk score, determining whether to flag the transaction for review.

18. The computer system of claim 15 , wherein the proxy domain risk score is higher when the age of the proxy domain is below a threshold amount of time.

19. The computer system of claim 15 , wherein the set of transaction URLs includes a return URL to which the browser of the transacting user is to be directed upon completion of the transaction.

20. The computer system of claim 15 , wherein the registration information for the proxy domain comprises registrant contact information comprising at least one of a mailing address, an email address, or a telephone number.