Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dc99ee7d3a0c46…

MALICIOUS

PDF

78.0 KB Created: 2020-08-06 18:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0233032ef678649708882b458f5dc7e4 SHA-1: 6c6192a6f498afd33ff40066c52e53d1fb7877fb SHA-256: c6dc99ee7d3a0c4638472058d4b8b800d807a26e6fee47b3eb010de4b0358671
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, suggests a lure related to a 'biogas plant visit report'. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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/wb?keyword=biogas%20plant%20visit%20report%20pdf
    • http://files.kurtmorris.net/uploads/1/3/0/9/130969352/natodesafoji.pdf
    • http://files.justmytour.com/uploads/1/3/0/9/130969974/8955763.pdf
    • http://files.dennisplott.com/uploads/1/3/1/4/131453365/worozuj.pdf
    • http://files.tangicolombel.com/uploads/1/3/0/7/130738978/notesuzu-nezovejani-rigodojenoloxik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/boradiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/46090480020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/fizirifizowuvizafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/sowale.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/vexatiwiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/31350483499.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/accelerated_learning_for_expertise.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/julobefus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/dolumavafezox.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/99872774462.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_off0000ea4b.bin
3b39b61b2349b163413bbba082df52378d14170224fae9695b44d919131fb9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 5316 bytes
font_01_sfnt_off0000fc80.bin
754f324649385356751c41e32f578e2b8535ed22b9f2fbbf16f01e3f9fb40aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 15272 bytes

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