Therefore, its always best to avoid downloading any suspicious files via Telegram in general.
I would correct that phrase. Its always best to avoid downloading any suspicious files in general.
Downloading and running files on PC is high risk business. You should do that only from official websites and only if you REALLY need it. Nothing else if you want to keep your PC secure.
Well, the OP is about Telegram malware.
However, I think it should be common sense to avoid such downloads of suspicious files in general, don't matter if they are offered on Telegram or a website.