Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff81ba578f9cd14…

MALICIOUS

PDF

36.1 KB Created: 2020-08-02 16:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17c4025c4e6b91db731f9c6a6129c08b SHA-1: e34cf1406ebc717cf0542ce9697a8c1f845c6478 SHA-256: 2ff81ba578f9cd1448faae516eec1a7dd036c6d186cb182680d6f970b3b534dc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body and metadata suggest a lure related to 'The Walking Dead' to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=eztv+the+walking+dead In PDF document text
    • http://files.shaysbowtique.com/uploads/1/3/0/7/130776536/2c018.pdfIn PDF document text
    • http://files.youcandoitdancefitness.com/uploads/1/3/1/4/131438510/4253233.pdfIn PDF document text
    • http://files.urbanpho.com/uploads/1/3/1/3/131398605/mepevivojik.pdfIn PDF document text
    • http://files.minnesotadivingacademy.com/uploads/1/3/1/4/131438056/widajazuw-wovof-rutiso.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/1/0437/1028/3931/files/nivufigetazali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/9152145356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/random_number_between_1_and_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/pokotodunevowabepekitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/savabufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/64190399815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/60292924734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/xujojig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/fijafapilazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.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_off00005244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5244 5036 bytes
SHA-256: c3e06c78eae1d10e686f7f4d732497cfbb82d2c29e5d52b288dca141a797b275
font_01_sfnt_off00006386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 9432 bytes
SHA-256: 40fb46c234ba2e579dc955ff422c5ad5cd1d451d9fb3e7ead9a5996299bff21f

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