Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f2eb9b1c9ce125…

MALICIOUS

PDF

40.4 KB Created: 2020-07-28 10:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91ddd640eba01be7454f6f820f50fbce SHA-1: 5beb1f65640a03e817282f14a33a9933f0b9d047 SHA-256: d1f2eb9b1c9ce1252d3d0403d2bd3276ff5fe07faa10f693831526afb5e5882a
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=behold+a+pale+horse+audiobook'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes the phrase 'Behold a pale horse audiobook', likely a lure to entice clicks on the malicious redirector.

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=behold+a+pale+horse+audiobook In PDF document text
    • http://files.thegoodloaf.co.uk/uploads/1/3/1/3/131380942/zerinobilidini-zikizagikulol-dubiwaluwi.pdfIn PDF document text
    • http://files.cramerpottery.com/uploads/1/3/1/3/131398374/tapelodowanop-vodeziter-fawibarazowisuz.pdfIn PDF document text
    • http://files.reseeworks.com/uploads/1/3/0/8/130813841/d5723.pdfIn PDF document text
    • http://files.bluegrassstream.com/uploads/1/3/0/7/130775373/pekobu_kanuwupi_vuzazuso.pdfIn PDF document text
    • http://files.alhasoob.co.uk/uploads/1/3/2/6/132696015/2388652.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/1/0431/6643/3429/files/52836411744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/natefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/84789091505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jojowisine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/41421539580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/waxofusegeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/kukirelafazijemiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/rivavedurawetosevutorum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/fivexakeneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/giruteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/newakulex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/51529121456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/25017509226.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 4996 bytes
SHA-256: cfee00baa6bbca292af740a567192334044f4818930ae5a73321966d902d7797
font_01_sfnt_off000072b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 9800 bytes
SHA-256: 4e51cc6110556b19a52749f93dc274544ea46d50dea8a28c4526c95e7ced218b