The bad guys use social engineering to make end-users click on links, and their scams rely mostly on exploiting trust. If they can make you believe a message is from a trusted source, chances are you will click. This trick has been used with email, instant messaging, social networks, and they are even spoofing SMS text messages. But the new frontier is Mobile Apps.
Warn your users that messages from mobile apps like for instance WhatsApp or some other mobile app they use are not automatically legitimate. The same rules apply as with normal email. If you click on a message from a mobile app, you might download malware and infect your PC: Think Before You Click!
Kaspersky Labs spotted this trend first, and you can check out their full Spam Q1 2014 report here:
http://www.securelist.com/en/analysis/204792334/Spam_in_Q1_2014
