Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3d8f8fb6261016…

MALICIOUS

PDF

57.1 KB Created: 2020-08-23 10:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52d5dba90d509e2613d19ef4715a35ff SHA-1: 10ea49e3510a0c169ec91793ee2ef3f3679a1a46 SHA-256: 6c3d8f8fb6261016f41e4e2e107496ee764556060168971d2f816704ffc9899d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical finding of a link to known malicious redirector infrastructure. The embedded document body text also contains the malicious URL, suggesting an attempt to disguise the link as relevant content. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector.

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=atypical+pneumonia+pediatrics+pdf In PDF document text
    • http://files.churchofthewild2rivers.com/uploads/1/3/0/7/130776423/8975746.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/1/0428/9835/8432/files/46676539889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/zajorixasitux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/mozetitolumadovaregi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/sony_bm10_bluetooth_music_receiver_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5754/files/46712900145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/36692736823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/suzeboniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/mewikerimogaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3899/0485/files/38302572783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/namulivifirun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/2353/9864/files/best_kitchen_appliance_brands_consumer_reports.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
🗂 Part of campaign: shared payload 1c8776aa7f 3 samples

Related samples 1

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_off00009e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E55 5392 bytes
SHA-256: 1c8776aa7f32be625e09063b1ebaa807b210c760479465dfe71a5759dea6edaf
font_01_sfnt_off0000b091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB091 12108 bytes
SHA-256: 6ede41f9f248916ee9813aa570d195968e59e9d850aa11d7871e45cf9deb5c42

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