Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c3d909abd29492…

MALICIOUS

PDF

71.8 KB Created: 2020-08-29 19:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0188e0025d89b066183bf58bb54fd1b5 SHA-1: 2d6607d227e70b9fc2fa758f7dc8e797fd65b331 SHA-256: b4c3d909abd2949230ae28283b8cc1035333bd5ab850f62812094497572a4761
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it contains a link to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.ru/wix?keyword=theoreme+de+pythagore+et+thales, which is likely used to funnel victims to a phishing or malware delivery site.

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/wix?keyword=theoreme+de+pythagore+et+thales
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/aromaterapia_egipcia.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/inoculation_chamber.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/93991313989.pdf
    • https://cdn.shopify.com/s/files/1/0437/2447/2471/files/administrao_cientifica_resumo.pdf
    • https://static.usrfiles.com/ugd/a91264_09c23e6cbd3a4234935b3fdf6a5cd56f.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/82697565790.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/74362072263.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/objectives_of_research_report.pdf
    • https://cdn.shopify.com/s/files/1/0461/8236/7386/files/90174938673.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5600/files/astor_piazzolla_oblivion_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/8434337792.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c36f.bin
315999643ee216cc40941024a00756674087a0a60dbea9d8f3eda52e3aea5ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC36F 5060 bytes
font_01_sfnt_off0000d4ad.bin
fcb5ecf9344b249cfefd3bd22db262c5cc9abc91d477048e65512e56fab03234		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 15496 bytes
font_02_sfnt_off000102c0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 4324 bytes

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