As you know, iPad 2 jailbreak has been leaked via a beta tester. If the leaked URL http://ryanlobbins.com/Saiz/saffron/iPad_4.3_8F191.pdf is not opening for you, it may be due to server overload. Whatever be the reason, your only option for now is to wait since there are no mirror URLs available.
We would still advise you to wait for official release from Comex instead of going for the leaked build. It’s very likely that comex will release JailbreakMe very soon since he’s been testing it out for quite some time.
JailbreakMe is browser based jailbreak that lets you jailbreak your device without connecting your device to the Computer.
Update: iPad 2 Jailbreak has been pulled by the beta tester who uploaded it. It was fun while it lasted.