iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini (WiFi), released on 2015-08-13T18:05:07Z. The update package is 432.81 MB. This is a delta (partial) update that requires 8.0 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 10b2f551cd9fdcfa4550a75900203f29a2647d75.zip.