Tehran has been supplying Iraq with lethal aid despite the UN Security Council's unanimous decision to impose an embargo on Iranian weapon exports.
The Iranian analyst also warned that the West will be less inclined to tolerate a rise in Iranian weapons flows to conflict-hit Iraq should the US-led air campaign against ISIL succeed in Syria and Iraq.
Last year Iran reportedly signed a deal with Iraq to supply it with weapons and ammunition worth $195 million, prompting the United States to request an explanation from the government in Baghdad.
Prior to a rapid rise of ISIL last summer, the White House had intended on explaining to Iraqi officials the "limits" that international laws place on Baghdad's arms trade with Iran, according to US State Department spokeswoman Jen Psaki.
Since August, the US forces have carried out numerous air strikes against ISIL targets in Iraq and Syria.
Iran reportedly supports its fellow Shiite Iraqi government in the fight against the Sunni ISIL with arms and military advisers. In December 2014, the Pentagon said Iran had conducted air raids in eastern Iraq. However, Tehran has denied any involvement.