JUDITH MIDRASH SOURCES: Dan Rabinowitz e-mails:

Here are the midrash sources for the Judith story that connect it to the story of Chanukah. Yellnick, Betei Midrashim, Vienna, 1877 Heder Beit page 12; Heder Vav page 2 and Heder Aleph, p. 132. There are also a couple of books that were printed in the 16th and 17th centuries that also have the Judith story connected to Chanukah, they are, Ma'ashe Yehudit, Constantinople, 1552; Ma'aseh Yehudit, Venice, 1650 also in the Hemdat Yamim, attributed to Nathan of Gaza this story is connected to Chanukah, see Hemdat Yamim, Venice, 1757 volume 2 pp. 56a-58b. See also , Eisenstein, Otzar Midrashim, New York 1928, vol. 1 203-209 who has a couple of the narratives. All of these are fairly late.

However, there have been questions to the connection between Yehudit to Chanukah from the at least the 16th century, see Azariah de Rossi, Me'or Enayim, chapter 51 recently translated by J. Weinberg, Yale University Press, 2001 pp. 637-639.