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:

ECSC{7dd2c1f23fda4967b9496e773e6ee613092d450e41787985790da9df6e8116e2}

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