It appears that wikileaks did work directly with Trump Jr. to coordinate pro Trump leaks and campaigning [1]. Whether wikileaks was actually pro-Trump, or merely playing the part with the hope of developing a relationship which could lead to their acquisition of confidential information is unclear.
"“Hey Don. We have an unusual idea,” WikiLeaks wrote on October 21, 2016. “Leak us one or more of your father’s tax returns.” WikiLeaks then laid out three reasons why this would benefit both the Trumps and WikiLeaks. One, The New York Times had already published a fragment of Trump’s tax returns on October 1; two, the rest could come out any time “through the most biased source (e.g. NYT/MSNBC).”"
"“Hey Don. We have an unusual idea,” WikiLeaks wrote on October 21, 2016. “Leak us one or more of your father’s tax returns.” WikiLeaks then laid out three reasons why this would benefit both the Trumps and WikiLeaks. One, The New York Times had already published a fragment of Trump’s tax returns on October 1; two, the rest could come out any time “through the most biased source (e.g. NYT/MSNBC).”"
[1] https://www.theatlantic.com/politics/archive/2017/11/the-sec...