- domain reputation
- ip address reputation
- hot linked image/css/js from a malware-flagged domain
- possibly the domain is highly correlated with a malware / SEO clout ring (a group of other domains specifics used to try and game whatever benefit PageRank may still have)
When I maintained a social media site, we had lots of users hotlink to random websites that hosted an image they wanted to display. If the hotlinked host/domain got flagged as Malware hosting, our user’s page (on our domain) would also get flagged. Note: this was Google Chrome’s malware detection, not AdWords, but it may be relevant info.
- domain reputation - ip address reputation - hot linked image/css/js from a malware-flagged domain - possibly the domain is highly correlated with a malware / SEO clout ring (a group of other domains specifics used to try and game whatever benefit PageRank may still have)
When I maintained a social media site, we had lots of users hotlink to random websites that hosted an image they wanted to display. If the hotlinked host/domain got flagged as Malware hosting, our user’s page (on our domain) would also get flagged. Note: this was Google Chrome’s malware detection, not AdWords, but it may be relevant info.