Malicious PDF — malware analysis report

Static analysis result for SHA-256 9829f87e0c34861e…

MALICIOUS

PDF

67.5 KB Created: 2020-08-13 07:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab2e3a8b72c4582e13106c17b722910b SHA-1: a12006541851f9d5962e68bb4abe9393c2e27b31 SHA-256: 9829f87e0c34861e3faafb96b7bf922afb1bd08d998e4be53d457e14ec0b6aa1
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a 'download button' heuristic further supports the social engineering aspect. The file is likely designed to trick users into visiting the malicious URL, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=avancemos+2+practice+workbook+answers+pdf In PDF document text
    • http://files.tjeducationalleader.com/uploads/1/3/0/7/130775934/varog.pdfIn PDF document text
    • http://files.teachingtheapocalypse.com/uploads/1/3/0/8/130874278/fenalexiwo.pdfIn PDF document text
    • http://files.fionahill.net/uploads/1/3/1/4/131437584/wufaro-fexodato-kowivukine.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/1/0431/7508/4193/files/eros_guide_las_vegas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/22073433108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/respuestas_cortas_a_grandes_preguntas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/rizatafemolexapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/vaforuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/20545451271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/c_p_singh_physics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/aviation_dictionary_jeppesen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/suxovugotax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/bretton_woods_institutions_and_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1549/files/brisbane_transport_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/algebra_1_system_of_equations_word_problems.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 5

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_off0000c4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DF 5744 bytes
SHA-256: 8e3553e2f23823700af57191f672e8b2d024e67f6d04311f76e991af931b6831
font_01_sfnt_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 12392 bytes
SHA-256: 9a9037c3ec052f7d36ea9eacd491f1109d7721e90074b7491b6bc0aca0bdd137

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