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) First seen: 2026-05-07
MD5: 055f04f402800ffd7202dcba00d585bf SHA-1: 6c7a385601f71edb7ab52d2f9231ea7a3b2bde2b SHA-256: 9d351ad0fd1aedf11d6deef379e5d9bb394f5aa5350e4541b64df70cfedeeba8
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 In PDF document text
    • http://files.stdavidscarrmill.org/uploads/1/3/1/8/131871874/wagog_zemevopidabavo.pdfIn PDF document text
    • http://files.smsdblueeagle.com/uploads/1/3/2/6/132681670/pemonixubob-gorazojebumamik.pdfIn PDF document text
    • http://files.biomarkerconsult.com/uploads/1/3/2/7/132740405/ralodogenuf_jalogibologeroj_gorusumisamusiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/81951831888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/87713466477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/93203944923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/celiac_diet_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/musuzuzedezidoxap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/adobe_audition_3._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/98395263445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/28942474401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/60471729286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/complex_adaptive_leadership_obolensky.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 5040 bytes
SHA-256: 40724ddb8f11c89ee7f244446656e608567640230293795095b2773fc7015415
font_01_sfnt_off00007210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 11216 bytes
SHA-256: 1c89ccfa98e81630d2f2e9c420852274ff356439cd5c2d97b484555654422935
font_02_sfnt_off0000969f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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