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Today, websites are exposed to various threats that exploit their vulnerabilities. A compromised website will be used as a stepping-stone and will serve attackers' evil purposes. For instance, URL redirection mechanisms have been widely used as a means to perform web-based attacks covertly; i.e., an attacker injects a redirect code into a compromised website so that a victim who visits the site will be automatically navigated to a malware distribution site. Although many defense operations against malicious websites have been developed, we still encounter many active malicious websites today. As we will show in the paper, we infer that the reason is associated with the evolution of the ecosystem of malicious redirection.

Given this background, we aim to understand the evolution of the ecosystem through long-term measurement. To this end, we developed a honeypot-based monitoring system, which specializes in …