The file "A-Rider-Needs-No-Pants.avi.11.pdf" exhibits common characteristics of a malicious file, employing a triple extension to deceive users regarding its true, likely executable nature. Such files, often distributed via Telegram or social media, pose a high risk of being trojans or ransomware designed to infect systems. It is strongly recommended not to open the file and to use sandbox analysis tools for safe inspection.
If you can provide more context (where the file came from, what you expect it to contain), I can give a more specific recommendation. A-Rider-Needs-No-Pants.avi.11.pdf
The pattern [name].[innocent extension].[malicious extension] is decades old. Classic examples include: The file "A-Rider-Needs-No-Pants