There is two things going on there.
First if you look closely you can see holes in the spud. This is insect damage, likely caused by a wireworm (larval form of a clickbeetle species.)
Second is a physiological damage in storage/shipping causing the black color. This is not blight or another fungus, but the tubers reaction to suboptimal storage condition (not enough O2).
CutePDF was the best.
https://cutepdf.com/products/cutepdf/writer.asp
Started out with it in XP.