Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3f93ab25f021e0…

MALICIOUS

PDF

78.1 KB Created: 2020-08-09 10:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cdccd5e16ea61c31b999cdc51f3abd1 SHA-1: e04d7a016e020cc81285fd267b0bea54b513ec81 SHA-256: ac3f93ab25f021e0549b8d03f1dc259c5789780cea0cc514d347550258d1006f
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'solving equations and inequalities quiz pdf' and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or SEO poisoning tactic to 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=solving+equations+and+inequalities+quiz+pdf In PDF document text
    • http://files.clovercreekaerodrome.net/uploads/1/3/2/3/132302999/gesuzupixup.pdfIn PDF document text
    • http://files.bookhivebeerclub.com/uploads/1/3/1/4/131406861/tedagugalulasadu.pdfIn PDF document text
    • http://files.davidtaylorphotographer.com/uploads/1/3/0/7/130739704/dukaxukubo.pdfIn PDF document text
    • http://timupadar.galwaygallery.com/uploads/1/3/0/8/130874493/pazodufumesegikaz.pdfIn PDF document text
    • http://files.longsilverconstruction.com/uploads/1/3/1/6/131606289/728493.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/1/0433/5868/3294/files/amparo_davila_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/70766023436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/cin._ignore_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/sisul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/88005119433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/gelugubirudejejanesaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/39641221131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0278/files/79538471073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/60180250524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/bomoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/sindrome_de_arteria_cerebral_anterior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/v_shred_carb_cycling_meal_plan.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_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 5452 bytes
SHA-256: da1ec5b443195cb30427b9e2768648b0fb61b1641ef15860b28b602300ea2f74
font_01_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 10740 bytes
SHA-256: d0b22115a0cb8337f5003a2c354d4eb5dab376ad3486710ea2e43d81c47b3f3d

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