Download iPadOS 9.3.5 (13G36) for iPad Pro 12.9-inch (WiFi)

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPad6,7
iPadOS Version 9.3.5
Release Date 2016-08-25
Update Date 2016-08-20
Sha1sum
bea0678c6502857494258d8da1beaa1d44744490
Sha256sum
4d2daaede321ef8f915ae79a40acb2581534c08173dc2736684a21e101b15851
md5sum
fd3785b37e9b8b65dae1519e91ec6872
Size 1.98 GB
FileName
iPad6,7_9.3.5_13G36_Restore.ipsw
Status

Download IPSW (1.98GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iOS 9.3.5 provides an important security update for your iPhone or iPad and is recommended for all users.

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222