Avoid random torrent sites. Not only are they illegal, but files labeled "Pacific Rim MKV" there often contain malware or are actually low-bitrate MP4s renamed to fool downloaders.
Let’s address the elephant in the Shatterdome. While the term is heavily associated with piracy, there are legitimate ways to own this format. pacific rim mkv
Use to rip your own disc. Use MKVToolNix to perfect it. Use Plex or Infuse to watch it. And never, ever settle for a 700MB AVI file again. For the Jaeger pilots, the only option is plasma cannon, chain sword, and Matroska. Avoid random torrent sites