You are not downloading the game itself. You are downloading a save file that you can use in the game. When you go in the game, when you are selecting which save to play, you can choose to restore a save game and you can restore the save file that you downloaded from my video description. So you will still be playing the game here at APH. The point of downloading this save file is that it has the best guns, rather than wasting hours of time trying to get them through the lottery, it's already there for you to use. Unlike SFH3, there is no hack for SFH2 to get the perfect guns in the lottery. Also, since you are some expert programmer, you might know ways to add a bunch of malware to the .sfh2 extension
(which I highly doubt is possible), but there must be some way for that malware to activate. .sfh2 save files only works if you use it in the game, every other program/computer won't recognize this file. There is no way any kind of malware will work even IF and that's a big IF you manage to add malware to the .sfh2 file. Since .sfh2 is simply a save file and not the game itself, and the fact that it is only a few kilobytes, it is most likely a simple text file but with a .sfh2 extension, and text files cannot have malware.
This is what you see in the game at the very beginning and you can restore the save. click on the image to see it clearer:
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