If anyone I know called me "bruh", "brah" or "bro" then I'd immediately suspect they were an imposter
That was partly what set my alarm bells ringing, it just sounded a little off, and completely out of the blue. Funnily enough, what I assume was a bot kept trying to get me and sent another couple of "bro" and "dude" messages, if you reply with "..." or the same as it sent to you it doesn't continue with the conversation and just sends another a while later,