The 29-year-old Norwegian got the new campaign off to the perfect start with two wins from the opening two events on home soil in Lillehammer.
Moan was 18th last time out as defending World Cup champion Jason Lamy-Chappuis took the win in Kuusamo however it was service as normal in Ramsau.
He made up the 30-second time difference between him and Mario Seidl and Haavard Klemetsen, first and second after the ski jumping phase, to win by nearly six seconds.
Moan was awarded 114.3points from the ski jumping to place third before doing enough on the cross-country ski to win by 5.9seconds in 22:53.6minutes.
Norwegian teammate Mikko Kokslien made up even more time, ranking tenth after the ski jumping to finish second behind Moan while Fabian Riessle took third.
Moan's total at the top of the overall World Cup standings is now 313 with three-time champion Lamy-Chappuis, who was fifth in Ramsau, second with 275.