Malicious PDF — malware analysis report

Static analysis result for SHA-256 8154939818e85673…

MALICIOUS

PDF

72.3 KB Created: 2020-08-24 07:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f6ca876bb4224d99e4d1303b2f4aa2d SHA-1: 2bfbe82a99ff62590b9e56a662fdcd38fda35ee5 SHA-256: 8154939818e85673250293c3b12deb04fcf9ab91cb21ec0409c812c34bf77401
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary redirector URL, 'https://ttraff.com/pify?keyword=grammar+practice+book+grade+3+pdf', is used to lure users with a deceptive offer of a 'grammar practice book grade 3 pdf'. This pattern suggests a phishing or malware distribution attempt, leveraging SEO tactics to appear legitimate. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of malicious intent.

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=grammar+practice+book+grade+3+pdf In PDF document text
    • http://files.boavitnutrition.com/uploads/1/3/1/6/131606563/c52d072d5.pdfIn PDF document text
    • http://fuminajev.royalyogablissfield.com/uploads/1/3/0/7/130776487/bezamasaniru-jejefumuko-jogizapilog-daxebemenolawub.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/1/0434/8693/7253/files/asamblea_nacional_constituyente_1991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/cable_stayed_bridge_design_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/15590863433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/44035537704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/26879977825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/25611994595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/61336957887.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 4

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_off0000c3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 5348 bytes
SHA-256: a26c7fefd011fe1d4ddbad41e77f4bd48953b8e157d9d60f53f88f2b69ce4a4f
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 15644 bytes
SHA-256: 507c9f5cb35654a49f5c76de5e41eeedeb978c1ff8a94f35b1a04cee1400c17b
font_02_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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