Well everything about that logo says Helvetica to me -- but altered, slightly. It is a logo, after all, and there is no hard and fast rule that designers can't modify a font when incorporating it into a logo.
An obvious mod is the round dot on the 'i'. Not so obvious is the tail on the 'a'... as it does resemble other fonts, but keep in mind heavier weights of Helvetica also sport the same style of tail. So, my guess is that the logo is Helvetica with mods (two, that I can see).
Now, I have to ask the question, why would you even ask if you already have the logo in vector format? (your attached PDF)
<edit>
But... you never know... tikiboyz just might pull something out the hat for ya...