Warmup PDF

Author: trupples
Contest: ECSC Romanian Quals 2018

The flag was written in the pdf with a completely transparent color and almost outside the page boundaries. Opening the file with a web browser that supports PDF files and reading the value of document.body.innerText revealed the flag:


Surrounded by two “decoy” flags: ECSC{tryhardertryhardertryhardertryhardertryhardertryhardertryharder!}