Facebook users are being tricked into helping scammers earn money, in the mistaken belief that they will receive a free $25 Apple iTunes Giftcard.
We have seen a number of Facebook users posting messages like the following onto their walls:
Free $25 Apple iTunes Giftcard
Limited time left, get yours now!
Clicking on the link takes you to a webpage which urges you to "Share" the message with your Facebook friends before you can go any further.
You should, of course, always treat such requests with suspicion - but that hasn't stopped many people unwittingly help the scammers to spread their links far and wide across Facebook.
Perhaps you noticed that you still haven't been given a free $25 Apple iTunes Giftcard at this point. Instead, the scammers would like you take a survey.
Clearly they have no qualms about using Apple imagery to try to trick you into believing that the campaign is endorsed in some way by Apple itself.
This type of survey scam is all too familiar to regular readers of Naked Security. The scammers earn commission for every survey they trick people into completing - and your chances of ever receiving an iTunes Giftcard are close to zero.
But it's too late for your Facebook friends, as you have already shared the link with them - and so the scam spreads across the social network as users pass it on between eachother.
Of course, if you have fallen for the scam, it's a good idea to remove all references to it from your Facebook page and warn your friends not to participate in it.
If you use Facebook and want to get an early warning about the latest attacks, you should join the Sophos Facebook page where we have a thriving community of over 100,000 people.Follow @gcluley