Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34264df3c237e9d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-15 04:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb2ff1a6d5f5e2b3c10a1a86155fcf5 SHA-1: 24f9f07bc34c182ef55810cbd0295de1afb43708 SHA-256: c34264df3c237e9dcef02466afc772fda360aa173b91f2cb45b053c32dddade9
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One link points to a known malicious redirector at 'ttraff.com', suggesting a phishing or redirection attempt. The document also exhibits characteristics of a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation or to obscure malicious intent. No scripts were extracted, but the presence of malicious redirectors and the overall structure indicate a likely attempt to lure users to harmful content.

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.com/pify?keyword=ball+shaped+pillow+forms
    • http://files.shulman-writer.com/uploads/1/3/0/7/130739970/a80e4c53c4.pdf
    • http://files.amershamaccommodation.co.uk/uploads/1/3/1/0/131070737/7917972.pdf
    • http://kekaxesoj.stdavidssociety.org/uploads/1/3/1/0/131069766/4977921.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/varoleje.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/restaurant_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/discord_how_to_bold_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/2807929118.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/calendrier_2020_avec_jours_fris_vacances_scolaires.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/jirebu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/84823184359.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/diwumibulejonirunivajupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3016/files/kupiruvekukefikik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/node_js_advanced_tutorial.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_off000073bb.bin
3705158f4be9c653a59abd28b97c640aceeaa153dd2e6943360d12fffc680ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 5424 bytes
font_01_sfnt_off00008618.bin
ff7dca0ee50157cb0f5f039d861a4eceb5fded230d5cefe1b7c5f38383cb725d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 10800 bytes

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