If the waveform isn't clipping, you can just bring the volume down, but if it is clipping... the rule is, Garbage In, Garbage Out. There are a few filters that can smooth it out a bit, but if the audio is clipping, there isn't much that can be done to bring it back. Try the smooth/enhance filter, bring the overall levels down. There may be some others on here familiar with other filters that can help.
Oh yeah, that is clipped. If the original file is the same, a de-clip processor can help... some. It won't be perfect though. De-clipping apps, work fairly well on occasional digital 'overs' but if the audio recording devices input stage is over-driven all bets are off. Sound Forge Pro's NR-2 suite has a de-clipping process, there are others as well. iZotope's RX is highly regarded, It's rather expensive though.