iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini (GSM), released on 2015-08-13T18:05:07Z. The update package is 413.75 MB. This is a delta (partial) update that requires 8.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 44a0cf0138546b5748c2a98e672c1947bb287cec.zip.