aliphatic nitrile reduce by Diisobutylaluminium hydride (DIBAL) whereas nitro group remain unchanged.

BH3-THF and AlH3-THF.

I'm not sure if the nitro group remain unchanged. It can be at least converted to an azo compound or to hydrazine but nonetheless DIBAL would be worth an experiment.

Here is a simple reducing medium , but you will have to check the potentils of these two groups to see if it is selective enough.  ChemInform 56(23). DOI:10.1021/jo00023a043  (hint : one of my earlier publications).

Jakhar,

You may use BH3-Me2S in THF, temp. 85°C → 95°C. See

---Richelson, Elliott et al PCT Int. Appl., 2014159251, 02 Oct 2014

Good luck

Try with DIBAL-H in tetrahydrofuran

Nitrile to amine: BH3 or maybe CALH (Calcium alkoxyaluminium hydride)

http://www.google.ch/imgres?imgurl=https://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/AlkoxyAlGen.png/500px-AlkoxyAlGen.png&imgrefurl=https://en.wikipedia.org/wiki/Reductions_with_metal_alkoxyaluminium_hydrides&h=599&w=500&tbnid=ogHEgOazhuAH0M:&zoom=1&docid=ynSMg4uSmGFUBM&ei=h9uLVZ3cBseuU5a3o6AN&tbm=isch&ved=0CB0QMygBMAE