Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe78da91fe44596…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 13:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b81685286b0553dc9722c9924b97ccd SHA-1: 69ef07ce651bd3f870d9537b70686da549ccbb94 SHA-256: cfe78da91fe445963804a1711e9719705f753c57239d45aa6b95c6d3bb1231a4
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to a link farm hosted on Shopify, with one URL redirecting to known malicious infrastructure. This suggests the document is part of a larger SEO poisoning or link distribution scheme. The ML classifier also strongly indicated maliciousness.

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=capacitor+run+motor+pdf In PDF document text
    • http://files.sterlingartsanddesign.com/uploads/1/3/1/3/131381919/2a68e.pdfIn PDF document text
    • http://files.drkaska.com/uploads/1/3/2/3/132302926/tawajube.pdfIn PDF document text
    • http://files.yourpoolguy.ca/uploads/1/3/0/7/130738596/timululati.pdfIn PDF document text
    • http://files.montaukmist.com/uploads/1/3/2/7/132740620/bomuwetuzadezagomugu.pdfIn PDF document text
    • http://files.funtastic101.co.uk/uploads/1/3/2/7/132740949/luvopomuvusi_dumobuvakujet_lotudupenu.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/1/0439/3716/9576/files/66880244256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/pariwetibedoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/90620959047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/xexezow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/36419837638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/13423129638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/juxisabaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/77649580310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/65147041470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/bupomiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/wuzuwefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/9608916104.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_off000061e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 4996 bytes
SHA-256: 8b6494ba86a4369e5e2626989869eeb9aef528c9573c710f2b53468a56fc0b2a
font_01_sfnt_off000072cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 9772 bytes
SHA-256: cd7c451944c95ca13acc461bdc95ef8dcedf0bc9a0e0b2e2d80d9222fdcd88d4

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