iPadOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPad mini (WiFi), released on 2016-08-25T16:53:09Z. The update package is 825.2 MB. This is a delta (partial) update that requires 8.3 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: bc321f80575b633d9aa099e113dcb86ad1c38f8f.zip.