Just ask yourself the question. How did Virustotal check a file over 650mb according to their limit if it weighs over 2gb? So it can't check the file, it can only check the path to the file, which is what the url system finds the path to the file. But it cannot check the file itself in this case because they have a 650mb limit. What is the reason for developers to put viruses on their files, I don't think we are suicidal or masochistic to do that.