I posted the above to prompt explanation from someone with expertise in pdf malware to validate the safety of the linked pdf. I'm concerned that it has open act

I posted the above to prompt explanation from someone with expertise in pdf malware to validate the safety of the linked pdf. I'm concerned that it has open actions and objects that could be used to obfuscate js code. The author of pdf-id flags these attributes as requiring further inspection. Wouldn't a tech pdf of a popular book that is impossible to obtain legally in digital form be an excellent vector to deliver malware to tech users with probably lots of stored credentials to resources?