So, I got a chat message, and it is one of those clickbait links where if you open the link, a program autodownloads and uploads all of your tradeable items and gives them away to the hacker.

The layout of the message will probably look something like so:

Hi, I want to trade with you, check my offer at screenshot
http://www.thisisascammoron.co.uk/imagexxxx.jpeg

So, don't press on those.