The campaign using Microsoft

Microsoft Internet Explorer 4st1:*{behavior:url(#ieooui) } /* /* Style Definitions */tabletabletable.MsoNormalTable. Normal.Normal.0.0. /* Table Normal. Normal is a table of a table with a number of fonts, fonts, colors and fonts. */table.NormalTable:mso-normal.0; table.NormalNormalTable; Table Normal:0;.Table Normal;.table.normal.Normal-normal-table:0.Normal;.normal-normal;.standard-normal font:Calibrisans-serif.;normalizer:Table Normal.0″]

Source: https://www.bitdefender.com/blog/hotforsecurity/the-campaign-using-microsoft-office-outlook-web-access-name-boosts-the-infection-rates/