Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfc8a9738dcbba7…

MALICIOUS

PDF

112.9 KB Created: 2020-08-02 20:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f2f2840b698a72559b6327c7723e0b0 SHA-1: 6f90af99f16cdbe6c5ea80f042cdc0b537ad1936 SHA-256: 1dfc8a9738dcbba708bbd94a6dccac96fbd5e521184793e663d7bc441b51f27d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to external resources, a common tactic for SEO poisoning and redirecting users to malicious sites. Specifically, a critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=dynamics+chapter+12+solutions+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user into clicking this link. The ML classifier strongly supports the malicious nature of this PDF.

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=dynamics+chapter+12+solutions+pdf In PDF document text
    • http://files.betheone.co/uploads/1/3/1/0/131070152/dipijejumijekoga.pdfIn PDF document text
    • http://jamur.tahoesacredvows.com/uploads/1/3/1/6/131637419/5642726.pdfIn PDF document text
    • http://files.roundtripperbaseball.com/uploads/1/3/1/8/131871740/xapefavubopogub.pdfIn PDF document text
    • http://files.colliquecuffs.net/uploads/1/3/1/4/131483138/9278445.pdfIn PDF document text
    • http://files.drainagesolutionsdirect.co.uk/uploads/1/3/1/4/131455337/9698972.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/1/0437/7480/4126/files/97561151461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/rogugexalon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/60765044439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/mowapawal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2187/6899/files/87561556246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/4999132140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/86904082297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/niveben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/32756210417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/ferirusidovumipapaguraxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/zezukuridadekisaxo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA9 5680 bytes
SHA-256: 3093666b97b7490b6919c59d9c75f5a40c880abbb13d6c98d558fc8735410f0a
font_01_sfnt_off000180ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180EA 17000 bytes
SHA-256: e9ea819b63670c751b0ae0fdcaade1716be36a44e5b91d2bc98aa3882f6ff53e