Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb13ef844017dae4…

MALICIOUS

PDF

31.8 KB Created: 2020-08-20 22:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e34129d243073ecc7d2921b6787532c SHA-1: a2fe039b8dc107132b4e65da1b87b4b743a4ae87 SHA-256: cb13ef844017dae4de1f276d3077a80d17b9258add91aa6def4311256a8dcdd0
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, with the primary malicious link being a redirector. The document body text and embedded URLs suggest a lure related to 'New bhojpuri dance dj song'. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the primary URL leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation or to host further malicious content.

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.cc/pify?keyword=new+bhojpuri+dance+dj+song In PDF document text
    • http://files.scotdancenz.co.nz/uploads/1/3/0/7/130738769/8399703.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/1/0437/5448/7957/files/animal_crossing_new_leaf_3ds_fish_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7323/6131/files/agriculture_chapter_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1477/4169/files/19271119716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/fezopixuvikiximidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/paranudafowafojopajudate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/borehole_drilling_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/54205379981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/zudinirexonazegetez.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 2

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_off00003ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED8 5580 bytes
SHA-256: 08b115eceb4d655a85312fac9016239ed74151f1150b41df982dd19790279fc0
font_01_sfnt_off000051d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D7 9796 bytes
SHA-256: 7ed5134fed075ea365552cd5ff017e4de09611980f2ca2b4a6d3c94516793f0b

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