Malicious PDF — malware analysis report

Static analysis result for SHA-256 465e59ef091de692…

MALICIOUS

PDF

52.3 KB Created: 2020-08-11 00:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3e27b34b6c776776f14a7e896c5aa4b SHA-1: 05730c42c6a31c237f9e7759d7fe17115ba608a7 SHA-256: 465e59ef091de6926199906127e65c9023002348b0510138bcb8bbfdbfd3c677
150 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 'https://ttraff.ru/pify?keyword=cathodic+protection+training+pdf'. This indicates the document is designed to redirect users to potentially harmful content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cathodic+protection+training+pdf
    • http://zupetijof.jenniferhowardmde.com/uploads/1/3/1/3/131398140/bosipaselerir.pdf
    • http://files.amesquiltguild.org/uploads/1/3/2/6/132683334/fc15e9a.pdf
    • http://mejof.workwithflair.com/uploads/1/3/1/3/131380429/gatogadapota.pdf
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/biology_book_campbell_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/denuzalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/67516684463.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/30854784070.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/63874978238.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/mamutoresupedogomeret.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/59031443286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/85685039590.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/6338716421.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/administracion_de_empresas.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/mezovilalezapa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mudenutekigeje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e78.bin
c77d2ca029725c8ee4f50d61eb3feca648aee411da93dd49d0f12a989ada41df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E78 5112 bytes
font_01_sfnt_off00009fdd.bin
dc8109c53a9757eaf4760475f2fbd5c9447ec68fcca6959f578e0557b17273e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDD 10188 bytes

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