Malicious PDF — malware analysis report

Static analysis result for SHA-256 931890c53dd6ffc1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-15 05:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61d22016686e710a960cd6c7b7529a58 SHA-1: b7b9fd7808667039590e33c3de4ce777e7b32f8d SHA-256: 931890c53dd6ffc1d8c8652bda03f72a741e8da9a0bde7ce5f3b026e0caa2759
194 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=android+mobile+automation+testing+with+selenium+webdriver`. The document body, though partially corrupted, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links hosted on Shopify indicates a link farm strategy to improve search engine ranking or distribute malicious content.

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=android+mobile+automation+testing+with+selenium+webdriver In PDF document text
    • http://files.stemstudentinfo.com/uploads/1/3/0/7/130740011/lifed-gudegovipinoje-sevikizesezilu-doxopa.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/1/0428/9835/8432/files/25668779603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/wogiwisegetizafurewatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/8567581830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/rasokil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/41810880005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/bronkitis_anak_idai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/sukixutobodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/sizamozetofomimapozumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/sudeganeviba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/jebilepaxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/dapisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/misewudobe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5520 bytes
SHA-256: b620769ef055d0203577b0db24f8df1e26df791e219c98c10d5866e76e2167f3
font_01_sfnt_off00007cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 10972 bytes
SHA-256: 7a18cfd6fefe04655b214aa93f29d347b67f64607a90b2f4bdf6b2bf694a0517

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