Dec 4: HoHoHo

hint

Challenge

Santa has hidden something for you here

Solution

It’s a pdf file, opening in okular popped up that ther was an embedded font file, named DroidSans-HACKvent.sfd ..with hackvent in the name, that’s got to be hiding our flag!

We used fontforge to extract the font from the pdf file and view it:

hmm, we don’t see any characters in the boxes, so we select view->fit to bounding box:

And there is our flag! ..looks like the characters were just tiny and being selectively enlarged in the pdf to create the visible text.

Flag