Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0a318e98da4168…

MALICIOUS

PDF

48.7 KB Created: 2020-08-15 06:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 22574dedd85c3d0d0d7a77d2053fd17f SHA-1: e372ddf4d1a0941ab9c38c2f92af7055a80325c2 SHA-256: cb0a318e98da41688a54ce5373ea3704f1ddadbe242568f0fa9387104c28f298
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is used in conjunction with a keyword suggesting a lure for sensitive information. The document also exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs, likely for SEO poisoning or to obscure the primary malicious redirector. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL.

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=audit+assistant+interview+questions+and+answers+pdf In PDF document text
    • http://files.woodburyhistorysociety.co.uk/uploads/1/3/0/7/130739525/zegadexubodeje-xijikis-bubuto.pdfIn PDF document text
    • http://files.audrashouseofcakes.com/uploads/1/3/2/7/132740804/wibuzidunigep_girusativode_lirimurefuwo.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/1/0427/8226/1415/files/nodutuzupanapuboze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/49097818130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6481/8838/files/rixomojimuzes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0365/5830/files/free_weight_loss_meal_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/zokanajizof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/monstrous_arcana_the_illithiad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/fidudatolonamegugezavuvuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/95994960279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/judicial_internship_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/pofitiluwepifom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/telugu_movie_apps_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 5152 bytes
SHA-256: 7dacffd24bd777dc84e8911ef8d2f40f9dca160d9825a136306ada89909e2ec9
font_01_sfnt_off00008568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8568 9996 bytes
SHA-256: 57df1bcf544bdbeceb65f5bed677ed65f4c3616e9d52275b720251503c5de0e4
font_02_sfnt_off0000a796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA796 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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