Facebook users just Beware!! Don’t click any porn links on Facebook. Foremost reason is that you have thousands of good porn sites out there, but there’s an extra good reason right now. The Facebook malware disguised as a Flash Player update and spreads itself by posting links to a pornographic video from the Facebook accounts of previously infected users. Once clicked, the malicious link will land you a website that will prompt you to quickly download and run a Flash update in order to play the video message purporting to be pornography.
Source: https://thehackernews.com/2015/01/facebook-scam-flash-player-malware.html