Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f3a961f04b1bd9…

MALICIOUS

PDF

49.8 KB Created: 2020-08-02 03:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d051a7cfa3dbe2d78d7a9bd5dc4f2fc SHA-1: 22edc374a29f2593ce3a148e51ae71e41c6a13a5 SHA-256: 16f3a961f04b1bd9f44935e53516ffb1bc5f903a9ac5c86007e418ab358dd95a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a primary redirector URL identified as malicious. The document body text, though obfuscated, contains references to "Latex document class" and the malicious redirector URL, suggesting a lure to disguise the malicious intent. The presence of numerous PDF links points towards a link farm or SEO manipulation 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.cc/pify?keyword=latex+document+class In PDF document text
    • http://files.nrchemistry.com/uploads/1/3/2/6/132681783/diloxevixofije_vusaxuletazez.pdfIn PDF document text
    • http://files.sfarzoproduction.com/uploads/1/3/1/3/131382243/vogoz.pdfIn PDF document text
    • http://files.uticavapors.com/uploads/1/3/1/3/131384335/sitepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/1154544286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/97461269755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/pink_vissual_pass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/gutiligapotapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/95269832775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/porig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/46572022042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/88827345282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/12353661532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/fidosoxaxugezaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/kik_for_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 4832 bytes
SHA-256: fc4e2834d75a8ab0626e4a60c8d05b25df5bd6c357693a2655ca79419036a2f5
font_01_sfnt_off000087ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CE 10760 bytes
SHA-256: 4720db05664900789339b4ac69930537a99a3f041017d324fc6ecdef99678f68
font_02_sfnt_off0000ac73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC73 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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