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 754.8 MB. This is a delta (partial) update that requires 8.4.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 473af3b2b846787f789eda0dcaa86e1782e4a12e.zip.