Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b17d8524a8ce54…

MALICIOUS

PDF

41.4 KB Created: 2020-08-17 17:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038c01cb659f69de713e7a42122a3fc3 SHA-1: 8ab42337ab6bf8f137c6aec8e6057731b0a2e3e5 SHA-256: 37b17d8524a8ce548ea0f4cccea8f224f3737ffa667260ef86381b20019da0d7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=nfl+2019+week+5+printable+pick+sheet'. This indicates a phishing or scam attempt. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. 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=nfl+2019+week+5+printable+pick+sheet
    • http://voronil.loganbrady2019.com/uploads/1/3/0/7/130738731/51663f347f3d.pdf
    • http://files.dominicrohangates.com/uploads/1/3/1/3/131383823/aae935489.pdf
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/68115561463.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/risikodudetobapilid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/vidilifepawepidorobob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/17698931182.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/6157549914.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/15889539534.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/nitejivutabad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/35592385097.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/balarama_digest.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/barixobom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/gastritis_cronica_sintomas.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_off00006173.bin
b3db23b529d2fa125b951b3f4f622e288c8eabc4de3c71faf7084dfcd9d84b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 5976 bytes
font_01_sfnt_off000075d3.bin
cce32d1757658add5f0ae1af92ef1044e50779e0b5387a2c597e15b24f96446b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 10272 bytes

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