Yeah but it requires people that want to download the file to install TG as well. 
Are you sure you’ve exhausted all free file sharing options? Dont know what exactly you want to share but github might be working for you.

I'm not able to host pdf files on Nostr, Show me a client that does and I will.

+TG let's me upload up to 2 gb per file

ghostcountbtc

How on earth people in this space still use Telegram? Freaking Russian spy tool and everyone just LARPing freedom here?