Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bfb4efa25fc91a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 16:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4d4ccf892f448387b220d2bddfe3f62 SHA-1: 39bb698f731aeacf6c6f7ed79e86dc7c407f8423 SHA-256: 40bfb4efa25fc91a61ee3138f4faa641bf04288ad8095979c5222817a1147f08
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=reflected+in+you+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=reflected+in+you+pdf In PDF document text
    • http://files.ejfranklinartloft.com/uploads/1/3/0/8/130813592/4660023.pdfIn PDF document text
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdfIn PDF document text
    • http://files.utahcleanwater.org/uploads/1/3/0/9/130969427/pagel.pdfIn PDF document text
    • http://files.pilateswithmichelle.org/uploads/1/3/1/4/131453526/877486.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/1/0429/0877/8663/files/dakabesesawukazadaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/xagotafakiwajijosesoraga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/budud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/riwokelew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/4410139601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/xitodegozorufoxodati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/31094822563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/99836048510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4616/4897/files/legapixav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rakapadanixip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/pamibupu.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_off00006408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 4776 bytes
SHA-256: ff35447249646d20c14907631423ce92a42a458f4cdc811440cacb882c76d883
font_01_sfnt_off00007473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 10684 bytes
SHA-256: 893d5ffb75b9c13f4cca287b400bf51e4c5a95d0fd9bdad01413c8d77cd4632a

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