Puzzle, several layers

Dear SG folks,

once upon a time this was a Cake Day thread but no more. Now it is just a puzzle thread.

I have been here for 3 years now :)
There is a little treasure hidden, I hope the following map will help you to find it.
9f48
b561
ed4e
11e7
a65e
fa16
3ee2
f826

Hint: We do not follow maps to buried treasure, and "X" never, ever marks the spot.
Edit: Thanks to knsys for drawing the map.

If you are on my naughty list and you are sure that you are on there by mistake, feel free to add me on Steam. Do not post here.

View attached image.