Malvertizing is still around…
Incident reported on 22 October 2014. Cite: http://www.proofpoint.com/threatinsight/posts/malware-in-ad-networks-infects-visitors-and-jeopardizes-brands.php
“Without having to click on anything, visitors to the impacted websites may be stealthily infected with the CryptoWall 2.0 ransomware. Using Adobe Flash, the malvertisements silently “pull in” malicious exploits from the FlashPack Exploit Kit. The exploits attack a vulnerability in the end-users’ browser and install CryptoWall 2.0 on end-users’ computers. Similar to the behavior of other “ransomware,” CryptoWall then encrypts the end-users’ hard drive and will not allow access until the victim pays a fee over the Internet for the decryption key. Typically, the end-users face an escalating time deadline; failure to pay by the deadline results in their hard drives being permanently encrypted, thus rendered effectively useless, with all information inaccessible.”
The affected sites are listed in the proofpoint article.