Download iPadOS 9.3.5 (13G36) for iPad 2 (WiFi)

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

✅ This IPSW firmware is Signed

Firmware Identifier iPad2,1
iPadOS Version 9.3.5
Release Date 2016-08-25
Update Date 2016-08-20
Sha1sum
daa2b495f135151bd5531b8deca99de5ebf613b4
Sha256sum
7e953e82f9f19406d8aa32920ba6366bd2c480b07c80db282b288150b72358ac
md5sum
3ff0428e0b7f3b5f814b90d9ebbaeff2
Size 1.32 GB
FileName
iPad2,1_9.3.5_13G36_Restore.ipsw
Status

Download IPSW (1.32GB) 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