Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b501590abc5bb86…

MALICIOUS

PDF

38.0 KB Created: 2020-08-06 23:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 904908c27d2f7b0d8e7f01072177cbcd SHA-1: 64653bc8fce1188ebf6717dcdc098d591352c121 SHA-256: 3b501590abc5bb86deef934c5a719706333508307bd2e532f7c68960908d29ce
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at https://ttraff.com/pify?keyword=biology+pdf+grade+12. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for phishing or malware distribution. The presence of many links to external PDFs, including one to a potentially benign Shopify URL, indicates a link farm strategy to improve search engine ranking or distribute malicious content.

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=biology+pdf+grade+12 In PDF document text
    • http://files.missiongolfacademy.co.uk/uploads/1/3/1/6/131636644/8600793.pdfIn PDF document text
    • http://lofibuveb.daffodilvalleyvolkssport.com/uploads/1/3/1/6/131606260/d3dd1f.pdfIn PDF document text
    • http://files.bremertondancecenter.com/uploads/1/3/0/9/130969801/27552eb2e3.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/1/0434/4155/3575/files/50_ways_to_leave_your_lover_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/lasuwekasiketumuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/rational_quality_manager_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/jovapat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/64103747731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/55531603566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/7077019035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/kalnirnay_october_2020_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/76451823643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/mogalokewiluxeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1652/6752/files/6186012943.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 3

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_off000055ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AB 5368 bytes
SHA-256: 55b4aec48c05b8b7ba0a9fe8927bbec211f17153f8db1013d613b3774e1490a1
font_01_sfnt_off00006811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 10068 bytes
SHA-256: 276f91526abc0e13503f2fbdafc5e39200ba9b93d402c6ca6ab2ddc57f0a4def

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