Malicious PDF — malware analysis report

Static analysis result for SHA-256 c246d800c94cb10d…

MALICIOUS

PDF

56.0 KB Created: 2020-08-05 02:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a409a903c59d79d36f124c09ecf36e0c SHA-1: 3d5f1cbed998f1b969564fd7cb8109109b566936 SHA-256: c246d800c94cb10d64ae3793a0c87293b408b17f4ee4d79258a8e8d98609c2ed
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, contains text that appears to be a lure related to 'Kaplan chemical pathology pdf'. The presence of numerous PDF links suggests a link farm or redirection strategy to obscure the final malicious destination. No scripts were extracted from this sample.

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/wb?keyword=kaplan%20chemical%20pathology%20pdf In PDF document text
    • http://files.amberrosedische.com/uploads/1/3/0/8/130873804/bubuj-bivapuwim.pdfIn PDF document text
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.pdfIn PDF document text
    • http://files.wingcrafters.com/uploads/1/3/0/8/130814205/7242032.pdfIn PDF document text
    • http://files.octaviaharris.com/uploads/1/3/1/4/131408741/nuzud-wawubadikixu-lebonigidoxeb-bidigazer.pdfIn PDF document text
    • http://files.chemaroma.com/uploads/1/3/1/8/131856353/sejoberis_zikejinisize_kamaganurudixad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/73127611753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9367/8497/files/sefafalit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/68248530353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/kebozifonazixopow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/18815191862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/nogumogagat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/fowudovobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/jafewufegokalimatogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/rigevipaduva.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D79 5368 bytes
SHA-256: f8ece2b179e8e707120ca811f5d4c286609240e95dae6eb093af212bfa611d73
font_01_sfnt_off0000afa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA9 10620 bytes
SHA-256: 25e57ba4ca9b4365f4155f411b62340376b7ea6b2561243683b47efe44ff7841

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