Links

http://www.filefactory.com/file/6gpo6ljkckz8/Mystery%20Box.zip.001
http://www.filefactory.com/file/6gg0mjw1vrso/Mystery%20Box.zip.002
http://www.filefactory.com/file/gpz06facpus/Mystery%20Box.zip.003

Alt Links

https://rapidgator.net/file/c1d3bfc2aae88eca4310b303f2e99bd7/Mystery_Box.zip.002.html
https://rapidgator.net/file/973de9c6b97313aece2e7041bbed0138/Mystery_Box.zip.001.html
https://rapidgator.net/file/1e52dcbd9767e450969724eb76d2f89c/Mystery_Box.zip.003.html

The files have been split with HJSplit, if you do not have it, you can download it from http://www.hjsplit.org
It is a lightweight application that requires no installation.
Alternatively, you can use 7-zip. You can download it from here: www.7-zip.org