Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6ae971bff091a9…

MALICIOUS

PDF

33.7 KB Created: 2020-08-27 16:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cd0e78b0f2d1ebac6ad9a3d9e6bfd20 SHA-1: 00afbb505b6fc068ca2233a669376a64a9942533 SHA-256: 6b6ae971bff091a92b84eeb1a7de5a9a4e202e8811eabdc9312c7f32a3b31ce3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body text, while partially garbled, includes the same URL and appears to be a lure for an 'answer key'. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for phishing or malware distribution.

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.ru/pify?keyword=al+kitaab+fii+ta%2527allum+al+arabiyya+answer+key In PDF document text
    • http://files.marthasvineyardgardenclub.org/uploads/1/3/1/3/131381555/nimusunetasazuvex.pdfIn PDF document text
    • http://bibemetoj.evespiritualhealer.com/uploads/1/3/1/3/131383648/tavobusu.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/1/0435/5158/8507/files/hp_deskjet_3050a_j611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/64315848045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/crime_patrol_satark_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1361/7302/files/principi_di_anatomia_microscopica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/78326693747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/miriwegigokezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/94762210517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/vizotilexatezobixuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/deadpool_kills_the_marvel_universe_read_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/modifiers_tinkers_construct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/61642469913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/sinkmaster_bonecrusher_750_manual.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_off00004722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4722 5332 bytes
SHA-256: a34d375ab4ebda0b290d6b82e7a15f6d6efc0dc157bf234c16c0feb2c69a8d00
font_01_sfnt_off0000594c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594C 9576 bytes
SHA-256: 58005c2733606a8103ed38bd8064e2805af44c87bbb08b24b331a56b6edce393

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