Malicious PDF — malware analysis report

Static analysis result for SHA-256 785bb34ccdd7d141…

MALICIOUS

PDF

42.1 KB Created: 2020-09-11 02:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 670e4d59cc4c8e58c5775682f2dd5cf7 SHA-1: 6b4972076912b80a006271dfbd64a1b742a815ef SHA-256: 785bb34ccdd7d141b6568f56b472227b9596db6ea692d752c87f268361d8e5d9
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs that point to redirector infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings, suggesting a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.club/wix?keyword=ambulance+mp4+song In PDF document text
    • http://files.jesusandbeauty.com/uploads/1/3/0/8/130874266/869453.pdfIn PDF document text
    • http://napabuluf.skyfieldtropical.org/uploads/1/3/0/7/130775162/b98991271.pdfIn PDF document text
    • http://files.stevenhoy.com/uploads/1/3/1/0/131069764/kopapasobuve.pdfIn PDF document text
    • http://files.live-arts.co.uk/uploads/1/3/1/1/131164033/6247e959a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/fafc38_04f535eba7844e869296d1cf697008cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d48fe3_64f64c9a267f4676ab9dfd24482e79b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/115d6e_de0200dc25914d7aa9a696703202668b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/857e61_99429ea2bc2c4bbebb6ad24f94acdf54.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/ponesezib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/keladaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/40037310486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4904/8474/files/flejadora_automatica_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_019c1e1e4bf74289a8ef882982d358ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fc3b0b_d63f7a385e1f4135a04f38becbac0a47.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 5372 bytes
SHA-256: 87c614387554f9dae93fba1dadeeb761873cc5234d44a09395a96b0ba1605544
font_01_sfnt_off000077d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D0 10488 bytes
SHA-256: a2c70edb3edcb3a275c61bf6c993dd7195a12cb9f7923b82e48c0ed8b44946f9

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