Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b433969cf56cb5…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 23:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25332cbd027475e5d5d4c543623a5bb1 SHA-1: 4dcd7fad286be9305b485edeb26b89bd6afd47f4 SHA-256: a2b433969cf56cb5a240413b19d17054d975cec452ef1e3c841d0c8e87a3c8dc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This indicates a link farm or redirection scheme designed to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'speak your mind english book pdf' and the malicious URL, suggesting a lure to download potentially harmful content. The ML classifier strongly flagged this PDF as malicious.

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=speak+your+mind+english+book+pdf In PDF document text
    • http://files.sarahdronfieldproofreader.com/uploads/1/3/0/7/130739648/f5f2ed.pdfIn PDF document text
    • http://files.kristinsfinefoods.com/uploads/1/3/2/7/132712040/denewevejuku.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/1/0433/4967/2091/files/cash_neuro_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/diccionario_psicologa_apa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/64435116380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/zuzinabilunagudidamipozud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/blank_newspaper_template_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/27857268308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/preparation_of_balance_sheet_from_ratio_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/48549581355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/84075570803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/59792475591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/goxol.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 8

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_off00005c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C13 5864 bytes
SHA-256: 144bfef57e21550f5d79ee61246e3a9b38e09a6ff266b5188f67399aab0a552d
font_01_sfnt_off00006fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 10208 bytes
SHA-256: 081fefd878670aa2c0d1bdfea440caafca8831dd1235322c6c10252b8b225631

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