iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2015-08-13T18:05:11Z. The update package is 407.56 MB. This is a delta (partial) update that requires 8.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 38bc2b4c79f529471fbc7982199e72c1a2bcb1db.zip.