There are multiple reason for this behavior of your sharepoint farm. exclusing all other DNS mapping and firewall and proxy configurations there might be a problem in SharePoint Access mapping that will cause the this behaviour.
Furthur descrbing the issue…
when you type http://abc.company.ae it may redirect to http://d.company .ae ; the second address also you wanted and imagine its in AAM.
This behaviour is tottaly because of Aulternate Acess mapping , where you have put abc.company.ae and d.company.ae in same default zone in Alternate Access Mapping.
so just delete one entry from Default Zone and put it to another Zone.