If you're looking for the technical side of what that download actually is:
Archive mastery with a classic workhorse WinRAR is a powerful file compressor and decompressor. It has been around for many years, How to Open RAR Files on Windows, Mac, and Mobile - Avast
RAR files are usually safe to use. But just like regular files, compressed files (RAR or ZIP) can also contain viruses or malware. How to open RAR files | Trend Micro Help Center
The link was unassuming, buried in a forum thread from 2012 that had long since been abandoned by its moderators. It just said: .
Always be careful when downloading small archives from unknown sites. Even a 449K file can contain scripts or malware that only "activate" once you extract them.
You click it. The download is instantaneous, a blink of the browser’s progress bar. The icon sits on your desktop: a stack of three tiny books bound by a leather strap. You right-click.
Was there a you were looking for associated with that file size? WinRAR - Download - Softonic
In the world of terabytes and lightning-fast fiber, 449 kilobytes is a ghost. It’s too small to be a modern game, too large to be a simple text document, and just the right size to be something dangerous—or something forgotten.