Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cb70054b8cb4ad…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 01:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3c81199eb5a3fe8272e5f600ad52f78 SHA-1: a7370a67dc60433c8c05db283302a64a06156b61 SHA-256: b9cb70054b8cb4ad2a862f321e31b9a1ddb5ba11ec853024012dea5529e4c130
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily corrupted, contains fragments of URLs and text that suggest an attempt to disguise malicious links as educational content. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. 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=learnzillion+guidebooks+grade+4 In PDF document text
    • http://files.julietzanniceramics.com/uploads/1/3/0/7/130776363/d09e11.pdfIn PDF document text
    • http://files.kresscinema.com/uploads/1/3/0/8/130874058/wonep.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/1/0431/5942/1092/files/12647081387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/voririlujovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/62005369211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/16506331879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/www_frys_com_rebates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/merge_sort_space_complexity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/kigisixigogatewetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/39508126125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/wordly_wise_3000_book_6_lesson_1_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/radial_piston_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/barujexuvariroseta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/48559106407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/putuwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/gosonomafosozutetudula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/94393379733.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_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5276 bytes
SHA-256: 433d82f42a15c8ad1289bdd4fd58326aeb88854c2dfac7e30ad14e8211674e8f
font_01_sfnt_off0000751d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 10076 bytes
SHA-256: 99d562ac6dac438fb49dee8a929369036b6a0c6c81685f9f69786450f4268618

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