Tifs are flawed images that are easily exploited to run malicious code.
Your story on how you ‘met’ your ‘source’ smells of BS.
It is so unlikely and coincidental that the odds are better for a 747 to self assemble from an explosion in an AIRBUS plant.
There’s an easy way for them to disprove what you say. Let’s have a link to that other forum site so we can see the posts where they met and view the date and times on them.