Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b1d312f74aabd4…

MALICIOUS

PDF

42.9 KB Created: 2020-09-06 00:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9af1f401b76d2007328342e4128e9857 SHA-1: 97b56fdee071380baf8d04106a2ac9737c276a4c SHA-256: 93b1d312f74aabd4dc63bd985066281357ebd588ff0dad13f9b733931f4ee1cd
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a lure for 'free food' and embeds a link to a known malicious redirector. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com. The document body, though heavily corrupted, contains fragments of the lure text and the malicious redirector URL. The primary attack pattern involves social engineering to drive clicks to malicious infrastructure.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=app+get+free+food+uk
    • https://static.usrfiles.com/ugd/1813b3_b34c14b1409b4cbaa8499b17b12755df.pdf
    • https://static.usrfiles.com/ugd/b8c837_7504b0b7e3dc433197a63072daea3542.pdf
    • https://static.usrfiles.com/ugd/0994f9_dea90c03ebe44efab1c8b52c77a5e153.pdf
    • https://static.usrfiles.com/ugd/b8c837_275931a6218d46978e50a8921bcc6fe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d3cdd267ba24013aa003dcf96d5fa4c.pdf
    • https://static.usrfiles.com/ugd/d78803_ce21ade777c941e58e8e9dad4019d887.pdf
    • https://static.usrfiles.com/ugd/04e6f9_f5a503c2630f48a2a86ffccd01cd9c6c.pdf
    • https://static.usrfiles.com/ugd/3eed2b_ea78889d7f854c9c9c3e97d6de1d77b2.pdf
    • https://static.usrfiles.com/ugd/e1a791_aa017546e14a483fb03304a45e5d34c5.pdf
    • https://static.usrfiles.com/ugd/73c254_9d1c800052504c4497f97309c0fe5ac2.pdf
    • https://static.usrfiles.com/ugd/b8c837_161157c80ca949628ceda4d1d843ee1f.pdf
    • https://static.usrfiles.com/ugd/a44510_7d0250c3c61241dcb7646f57bcae1ca9.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/44467184488.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/51106032758.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/mosexitotiruza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006267.bin
83db1ad75c6952086c982736166c612d2ff10c714111633dc30e05162a8df6f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 4844 bytes
font_01_sfnt_off000072f8.bin
dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 1796 bytes
font_02_sfnt_off00007b82.bin
c0596eed387f2f36aaa256ae98796039b218e9bea4588db6e553f666f75f0ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 10292 bytes