Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8acb168fda1a2e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-12 21:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 431d3245c6a90832439a9746913be184 SHA-1: b689644f5f1d7e8e84b741ff3fd41431c02f2b7b SHA-256: 6b8acb168fda1a2ebf57d77fc37bc05400cd398eeee0f23e8548fbf3b02b8847
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is associated with malicious activity. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness, and the presence of a link farm points towards SEO poisoning for malicious purposes.

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=acute+renal+failure+in+dogs+pdf In PDF document text
    • http://files.drlouiefrodriguez.com/uploads/1/3/0/7/130740513/1720562.pdfIn PDF document text
    • http://files.golawnservice.com/uploads/1/3/0/7/130739213/nedux-bibag-depomudok-geben.pdfIn PDF document text
    • http://files.shopmsbconway.com/uploads/1/3/0/8/130874338/5985939.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/1/0432/4648/5672/files/85720980858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/x_ray_texture_pack_1._12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/sapigutulen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/59702943999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/oxford_picture_dictionary_english_german.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/popafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/fizulagekexuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/strange_fate_lj_smith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/firefox_developer_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/19872928050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/21393718220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.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 7

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_off0000739c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 5312 bytes
SHA-256: 556463a66bb7596c48e72c908cd693866009b9dfad1058d9045edd543f71355d
font_01_sfnt_off000085c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C0 10332 bytes
SHA-256: c8c3371cdf32315ccd271c0c47a5cf6851164f9d7b8ca75b0d1029c5913bc8fd

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