Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d351ad0fd1aedf1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 10:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055f04f402800ffd7202dcba00d585bf SHA-1: 6c7a385601f71edb7ab52d2f9231ea7a3b2bde2b SHA-256: 9d351ad0fd1aedf11d6deef379e5d9bb394f5aa5350e4541b64df70cfedeeba8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword suggesting a Trojan horse. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive PDF document leading to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=caballo+de+troya+tomo+2+pdf
    • http://files.stdavidscarrmill.org/uploads/1/3/1/8/131871874/wagog_zemevopidabavo.pdf
    • http://files.smsdblueeagle.com/uploads/1/3/2/6/132681670/pemonixubob-gorazojebumamik.pdf
    • http://files.biomarkerconsult.com/uploads/1/3/2/7/132740405/ralodogenuf_jalogibologeroj_gorusumisamusiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/81951831888.pdf
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/87713466477.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/93203944923.pdf
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/celiac_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/musuzuzedezidoxap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/adobe_audition_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/98395263445.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/28942474401.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/60471729286.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/complex_adaptive_leadership_obolensky.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_off000060db.bin
40724ddb8f11c89ee7f244446656e608567640230293795095b2773fc7015415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 5040 bytes
font_01_sfnt_off00007210.bin
1c89ccfa98e81630d2f2e9c420852274ff356439cd5c2d97b484555654422935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 11216 bytes
font_02_sfnt_off0000969f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969F 4324 bytes

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