Yeah, it's pretty common for hackers to upload backdoors to random web sites when they can and exploit them at a later date. If we're talking about a full serve

Yeah, it's pretty common for hackers to upload backdoors to random web sites when they can and exploit them at a later date. If we're talking about a full server compromise then I wouldn't use those downloaded data for anything except for analysis/archival purposes, unless it's been thoroughly cleaned first.