Hello,
This file may not be corrupt at all. Just NOT a Standard Midi File.
You attached the file MARIE.RAR, I managed to extract from this archive file, and found MARIE.MID.
I had a quick look in the file, and as I said, this is certainly NOT any sort of SMF.
I would suspect that at some time you may have loaded your original .MID file into something, which CAN load a midi file but in fact defaults to it's own format. When you came to save it, you did not specify to save as SMF and the file was saved as it's own normal format, but (??) may have retained the .MID extension.
Anyway, you need to try to remember what software you had been using, maybe that system might load it, and then allow re-save as MIDI.
I'll study the file in detail, and see if there are any hints as to what it might be saved as. It does not seem to be any digital format, as the file is still only 16k.
Any hints you might offer would be a help.
If we can determine what format it might be, then it may not be 'corrupt' at all.
Geoff