Painfully Deep Flag

Description

By smashmaster

This one is a bit deep in the stack.

Downloads: flag.pdf

Solution

Let's inspect metadata:

└─$ exiftool flag.pdf                                                           
ExifTool Version Number         : 12.63
File Name                       : flag.pdf
...
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
...
Producer                        : LibreOffice 6.4
Creator Tool                    : Draw
...
Creator                         : Draw

I then tried to open pdf with LibreOffice

painfully-deep-flag-1

Flag:amateursCTF{0ut_0f_b0unds}