Malicious PDF — malware analysis report

Static analysis result for SHA-256 86042c1c8e6a69c0…

MALICIOUS

PDF

36.7 KB Created: 2020-08-09 01:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 879335986163bb96c6732fb38341d7da SHA-1: 3dd62a14348236df1960b3e6eb50daab18a168aa SHA-256: 86042c1c8e6a69c0411f9b654d8a60b933ea269b19c9d25e5692d656a71d9c35
202 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically to a URL designed to appear as a free download for 'Warhammer 40k 8th edition rulebook pdf download'. The presence of a 'download button' heuristic and the ML classifier's high confidence score further support a malicious intent. The document body, though heavily obfuscated, contains the primary redirector URL and several other PDF links, suggesting a link farm designed to drive traffic to malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=warhammer+40k+8th+edition+rulebook+pdf+download In PDF document text
    • http://files.mscrystalhaggard.com/uploads/1/3/0/7/130740053/fobosel-ridizuf-sijixaxesi.pdfIn PDF document text
    • http://files.sigmachitowson.org/uploads/1/3/1/3/131381985/logonok.pdfIn PDF document text
    • http://files.empoweredbyamy.com/uploads/1/3/1/4/131484133/27580.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/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/o_neoliberalismo_histria_e_implicaes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/caballo_de_troya_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/nibemojaxireduwinonapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/limawolalugiwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/69681856932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/97504376618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/75560165050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/najefobojomafebawutume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/kuguxolal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.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 3

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_off00004f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F07 5836 bytes
SHA-256: 5b74c6480ea08d31c790bff5d0e5f683d1a41f2aac5d60ea5513663c3d26b2fa
font_01_sfnt_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 10128 bytes
SHA-256: 16baa3f864466c3feae19cbc0237f2151ec2d62d5167f6dec316b4eb67ce917d

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