Its a image forensics challenge wherein a zip file is hidden inside a gif file. We need to find the zip file and also another password to the pdf present inside the zip which contains the required details. Read the original writeup for more detailed information.

Original writeup (https://c12yptonic.github.io/ctf-writeups/ctfs/deconstructf21#the-missing-journalist-%EF%B8%8F%EF%B8%8F).