Hey guys,
short update. I tried this morning to open the files in different software and got the following results
Photoshop CS6: "Could not complete your request because it is not the right kind of document"
Illustrator CS6: "The file is not readable"
FIJI: "ImageJ cannot open TIFF files compressed in this fashion (6)"
Anyway, it is possible to drag and drop it into Microsoft Office applications. @walt.farrell, I checked the scanner (for those interested its a Kyocera TASKalfa 5551ci) for different .tiff formats but there aren't any.
Thus, it is apparently the file format, which is causing the issue but I don't think JPEG or PDF are good alternatives. Does someone, who is more experienced with file formats has any good solution for this issue?