US 12,170,687 B2
Method and system for determining spam URL
Yun Chang Kang, Yongin-si (KR); Kwang Su Oh, Seongnam-si (KR); and Seung Yun Jeong, Seoul (KR)
Assigned to Kakao Corp., Jeju-si (KR)
Filed by Kakao Corp., Jeju-si (KR)
Filed on Sep. 13, 2021, as Appl. No. 17/473,546.
Claims priority of application No. 10-2020-0118625 (KR), filed on Sep. 15, 2020.
Prior Publication US 2022/0086185 A1, Mar. 17, 2022
Int. Cl. H04L 9/40 (2022.01); H04L 67/146 (2022.01)
CPC H04L 63/1441 (2013.01) [H04L 67/146 (2013.01); H04L 2463/146 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method for determining a spam URL by a system for determining the spam URL, the method comprising:
(a) extracting a URL from an e-mail;
(b) determining whether the extracted URL is a redirecting URL by a predetermined method;
(c) when the extracted URL is the redirecting URL, accessing a redirection URL that is connected as a result of access to the extracted URL;
(d) when the redirection URL is the redirecting URL, accessing a subsequent redirection URL that is connected as a result of access to the redirection URL;
(e) repeating operation (d);
(f) when a last accessed URL in one of operations (c), (d), and (e) is not the redirecting URL, determine whether the last accessed URL is a spam URL; and
(g) when it is determined in operation (f) that the last accessed URL is the spam URL, determining the extracted URL, the last accessed URL, the redirection URL and the subsequent redirection URL connected between the extracted URL and the last accessed URL as spam URLs,
wherein, in operation (e), operation (d) is performed a predetermined number of times, and wherein, the method further comprises, when a number of connections to the subsequent redirection URL exceeds the predetermined number of times, stopping operation (d) and classifying the extracted URL, the redirection URL and the subsequent redirection URL, as the spam URLs.