iPadOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2016-08-25T16:53:09Z. The update package is 759.51 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: 7fcd01fc8a32547f818c04540a8261f06a3b6ba5.zip.