Experts at Sucury firm have analyzed a malvertising scheme that has hijacked at least two distinct Google AdWords advertising campaigns. Malwarebytes firm discovered a large scale malvertising campaign exploiting Googles DoubleClick and popular Zedo advertising agency to deliver malicious ad. The malicious redirect worked even in the Ad Review Center of the Google AdSense dashboard on google.com site where webmasters may view ads that Google displays on their sites. The impact of this last attack is significant, considering that some of the affected websites are visited by more than a million monthly users.”]
Source: https://securityaffairs.co/wordpress/32293/cyber-crime/malvertising-google-adwords-advertising.html