runs ads on Yahoo and Norton is reporting that it contains "Web Attack: FaceBook Fake Survey 3".

Severity: High
This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.

The signature detects fake survey scams.

Additional Information
Fake survey scams spread through facebook and other social media where users are presented with some intriguing videos, fake offers or messages and they are asked to fill different surveys before they can view it.

various browsers.

Web Attack: Facebook Fake Survey 3: Attack Signature - Symantec Corp.
I'm not sure, but it sounds like it could be using one of the invisible like scripts.