They occasionally post the official solution keys for past CTF challenges.
A comprehensive guide covering the Image Forensics questions related to this file. New_Dad_Cleans-Up.7z
You can find detailed step-by-step solutions and analysis of this specific file on community forensics sites: They occasionally post the official solution keys for
The "paper" or documentation you are looking for is likely the for this image forensics category. Because this was a competition file rather than an academic dataset, there is no formal peer-reviewed research paper; instead, the relevant documentation consists of walkthroughs that explain how to extract and analyze the data within the archive. Challenge Details Event: Magnet User Summit CTF 2021. Category: Image Forensics / OSINT. New_Dad_Cleans-Up.7z