You may be right about this particular speaker; her pronunciation here sounds a little bit like the short OO sound to me as well. Before the L sound, there are not many words where the short OO and short U sounds contrast in English, and it is known that at least some American English speakers* pronounce all of these words with the same sound (usually more like the short OO sound). You may know this already, but the short OO sound is usually spelled with the letter "u" before a L. This recording does not sound too odd to me, but the standard pronunciations of American and British English keep these two sounds distinct.
In my own speech I pronounce them distinctly, so for me, the words "hull" and "full" do not rhyme (the former has a short U, the latter a short OO sound).
In other words where these vowels are not before an L, I don't know of any dialects that pronounce them the same way.
*See this thread on ELU: hull and full