Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f653fef443da48…

MALICIOUS

PDF

33.2 KB Created: 2020-08-06 14:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1caf71cc4f82d5e98d89162f01aece40 SHA-1: d71fae2297a816809ee0331611b10b1607fb28b2 SHA-256: 17f653fef443da48f120bdf722fbf8cb0bca85820d79bc6d701c0dfb8f0d2f3d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with a primary redirector URL pointing to a lure for a business English PDF. This indicates a phishing or malware distribution attempt, likely using the link to lead users to malicious content. 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.ru/pify?keyword=cambridge+english+business+benchmark+advanced+pdf In PDF document text
    • http://files.ridgecrestelementarypta.org/uploads/1/3/1/4/131408465/kexedi-kabope-biduvatujef.pdfIn PDF document text
    • http://files.phmiinfo.org/uploads/1/3/1/8/131857655/5b0dd34c7.pdfIn PDF document text
    • http://files.shelbyanngiftsanddesign.com/uploads/1/3/0/7/130739885/d7e8cc3a4afb.pdfIn PDF document text
    • http://files.badgrrlbrenda.com/uploads/1/3/0/8/130814017/jowuras_masagenivuxu_dujona_xafelap.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/1/0435/5942/0063/files/19051498657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/77867857329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/woxarobazibenilezewafokok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/tukozitilewava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/37090514350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/15572030490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8458/5883/files/intex_saltwater_system_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7214/3001/files/55329923599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/bagagofar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/dakoxatisutakuwevupavak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/capital_structure_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/sutin.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 6

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_off00004451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4451 5736 bytes
SHA-256: d22ca1f5ca458d3f5c565af78dfd6bac47f4279d89d9f3c0bccdec48b17b3f30
font_01_sfnt_off000057aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AA 8916 bytes
SHA-256: 03bce44b1a3f829ac22633b8be60534b680d1637610b99894185505092d62c0f

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