For enthusiasts of digital forensics , such a file is a "black box." Opening it is like stepping into a room where the clock stopped; you might find metadata that tells you exactly when it was created, what software was used, and perhaps even the username of the person who zipped it up.
Could you tell me a bit more about or what you expect to be inside? Knowing the context (like a specific website or a project you're working on) would help me give you a much more detailed "write-up." File: 10966.zip ...
Because this is a specific file name, I'm answering based on the most likely scenario: that this is a or a digital mystery you've come across. The Mystery of File: 10966.zip For enthusiasts of digital forensics , such a