Malicious PDF — malware analysis report

Static analysis result for SHA-256 b938c8352c6761a2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 01:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a714bd225ccc33d107a2301eea2c64a2 SHA-1: c73b5b53ba98d0a128a5273f87cd1c57a9e7c7cc SHA-256: b938c8352c6761a2ca3d05de664ae6083bedc06f3d24c33028d14342d5201128
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains text related to a "medical examination form for canada immigration", suggesting a social engineering lure. The presence of numerous links, including those to benign Shopify domains and other unknown domains, indicates a link farm designed to obscure the malicious redirector. The ML classifier also 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.com/pify?keyword=medical+examination+form+for+canada+immigration In PDF document text
    • http://files.nanolab.info/uploads/1/3/1/3/131379749/befuraxigufero.pdfIn PDF document text
    • http://files.lewisrawlinson.com/uploads/1/3/0/7/130775649/9ef022b4c4a735.pdfIn PDF document text
    • http://dolotuzok.dangwaflorist.com/uploads/1/3/1/6/131606227/vinevotokok-modosubijudo-rolaw.pdfIn PDF document text
    • http://files.kulmschool.com/uploads/1/3/1/3/131398177/tupegusateke-fovape-jazak.pdfIn PDF document text
    • http://gowufo.palaciosviolin.com/uploads/1/3/1/0/131071157/b59130.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/1/0434/0911/3253/files/73542062428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2138/3333/files/cursive_writing_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/95801134640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/44292972139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/8196007881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/93846315983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/levizafop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/rawosok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/tafseer_al_bayan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/acceptance_and_commitment_therapy_hayes_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/callese_y_venda_gratis.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_off00007098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7098 5236 bytes
SHA-256: 3ca145c091296d3d2e5580ff6623d786b913b808525ed1e854838d999b7ac8bc
font_01_sfnt_off0000825e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 10144 bytes
SHA-256: 5d9a963c976cab4684e2072ff09f1e44fd0aa5d2589dbed78f7a9effcdf55055

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