Secret of the Polyglot

Challenge Description

Solution

After downloading the file, open the pdf to get the last half of the flag

We can use the file command to see the true nature of the file as shown

└─$ file flag2of2-final.pdf 
flag2of2-final.pdf: PNG image data, 50 x 50, 8-bit/color RGBA, non-interlaced

as we can see it is actually a PNG file, use the mv command to rename the file from .pdf to .png extension

└─$ mv flag2of2-final.pdf something.PNG    

And then open the file to get the first half of the flag

Submit the complete flag to complete the challenge!