Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cf9a809ca0da9b…

MALICIOUS

PDF

54.7 KB Created: 2020-08-21 23:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bde7680f2390c13727fa0d0fbe3b8b02 SHA-1: 56f337722e1401e458fc0250b138cac5278ed5cd SHA-256: b0cf9a809ca0da9bde48f39d559dc5c09edbc8626d3c9e6e4d2bde2329c00fbc
194 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a malicious redirector link, and another identified a large PDF link farm. The document body contains garbled text but also includes the URL 'https://ttraff.cc/pify?keyword=dyslexia+worksheets+ks1', which is likely used to redirect users to a malicious site. The presence of many links suggests a social engineering lure, possibly to trick users into downloading further malware or visiting phishing sites.

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=dyslexia+worksheets+ks1 In PDF document text
    • http://files.herrmanndj.com/uploads/1/3/0/9/130969052/farufavuzetap.pdfIn PDF document text
    • http://wisejaber.dunollycottage.com/uploads/1/3/1/3/131398020/3177146.pdfIn PDF document text
    • http://files.nextpathproperties.com/uploads/1/3/2/7/132740423/3147736.pdfIn PDF document text
    • http://files.holytrinitywytheville.org/uploads/1/3/1/8/131872079/e0311b76.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/1/0429/5429/3402/files/xajelejumunavotavule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/xumuwuwerani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/milesatudiwevuwibeponi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/bissetriz_de_um_triangulo_exercicios_resolvidos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/dabujovozujivigotunav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/26986851600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/sadija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/94513222816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/dukaxal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/6643699594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/conjugaison_anglais_traduit_en_franais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/nirefetofabugu.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_off000099d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D5 5152 bytes
SHA-256: fe7924bcad847fea2c84867f8e55b16060dbdd969a467222bf9c6a7649dd3975
font_01_sfnt_off0000ab77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB77 10148 bytes
SHA-256: 235f48171e3479be51d2da46fff8f0786064db32ac3eb494506606aeedcc154c

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