Only download .torrent files from reputable, well-known websites. Files from unknown sources or popup ads are highly likely to contain malicious content.
However, here is a general report on how to handle torrent files and ensure they are safe: Torrent File Safety Report Download File CD3CD3CD3CD3.torrent
Always right-click the downloaded .torrent file and select "Scan with [Your Antivirus]" before opening it with a client like qBittorrent or uTorrent . Only download