iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad 3 (WiFi), released on 2015-08-13T18:05:07Z. The update package is 1.06 GB. This is a delta (partial) update that requires 7.1.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: f70c79b3ce75c53bbdaa9fbab2a419677f57e57c.zip.