Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e8973903100fd5…

MALICIOUS

PDF

45.2 KB Created: 2020-08-26 18:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e43b3cf3daeeddea6fcf9291be8b5252 SHA-1: 53caec2b467832ccf590363734c7a7e766d94b60 SHA-256: a3e8973903100fd53139c6b9bbb83fbfd76b25bd4342089b06bc51175a4060ab
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.com/pify?keyword=visual+anatomy+and+physiology+lab+ma. This is supported by critical heuristic firings indicating a malicious redirector link and a link farm. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to academic materials, likely as a lure.

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=visual+anatomy+and+physiology+lab+ma In PDF document text
    • http://files.theblinddogranch.com/uploads/1/3/0/7/130740429/8591422.pdfIn PDF document text
    • http://sawixero.artfeltstudio.com/uploads/1/3/0/7/130738546/107337.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/1/0427/7207/0556/files/50161889408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/89820088345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/celeste_wiki_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/12198448231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/82027315718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8915/7537/files/guided_cow_elk_hunts_utah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2931/files/64101321138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9204/1118/files/3_bedroom_flat_plan_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/11822935502.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 2

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_off00006fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBA 5484 bytes
SHA-256: 0949a8afe81dcaa4c34a9609d93cdb44466acd7791b5301cdbe4c39c352e3a78
font_01_sfnt_off0000823c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 10560 bytes
SHA-256: 9eff947c34d9033d7f1d91f923162838269ab977a0ab5464007865e42d7da966

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