Kippo-Malware has been updated!
It now includes optional arguments to select an HTTP proxy through which to download the files (as to not send your IP to attacker-owned servers) and also supports custom User-Agent values. A list of HTTP proxies can be found online, e.g.: https://hidemyass.com/proxy-list/search-225414
You can download it from: https://github.com/ikoniaris/kippo-malware (git clone or pull).
For comments, suggestions, fixes, please use the Kippo-Malware page: http://bruteforcelab.com/kippo-malware