If the software was nulled (an almost complete certainty; the file scanner is looking for specific modifications of known files¹ and isn't operating on some sort of "this doesn't feel right" heuristic), then uploading it at all would be a zero-tolerance violation of the terms of service. Validating the origin and legitimacy of files is your responsibility; if you didn't get the software from the original vendor, then you need to verify more than you need to trust. Friends may think they're doing you a favour by saving you a couple of hundred bucks. Some favour, eh? (And no, it's not an accident. You uploaded a file. If you have gotten into the habit of uploading files whose source and contents are unknown to your web site, then you may want to rethink that strategy.)
Zero tolerance means there is no way to fix it. Yes, you will lose all of the files and data that you don't already have backed up locally. No, an exception will not be made for you because you seem sincere or contrite.
File your appeal, but with the understanding that if you did upload nulled software, your suspension will stand.
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¹ In fact, there's often a large "NULLED BY <name of group>" notice in plain text in the files, along with some ACSII art and a handy link to get more warez from the same group. You might want to take a look at the files in a text editor, just for fun.
