If the file size is less than 100MB for a 45-minute special, it is NOT the movie. It is malware. Delete immediately.
The movie you are looking for is titled (released in Brazil as Shrek no Natal or Shrek Especial de Natal ). For a safe and legal experience, you can stream or download it for offline viewing through the following official platforms: Where to Watch and Download (Dubbed) download filme shrek especial de natal dublado install