Malicious PDF — malware analysis report

Static analysis result for SHA-256 2768e7744ac23d87…

MALICIOUS

PDF

73.5 KB Created: 2020-08-25 02:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ffeea8e3e4a8f114d6e94714055b71b SHA-1: aa10fc493fa05d0bac36504563b06517828491f0 SHA-256: 2768e7744ac23d87bb8276e9a3d421088bd8c05d6d7506e9f923cfd09146871e
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm heuristic suggests an attempt to manipulate search engine results to distribute malicious PDFs.

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=binomial+distribution+proof+pdf
    • http://files.alleghenymemorials.com/uploads/1/3/1/3/131398052/6812202.pdf
    • http://files.froggyplaces.net/uploads/1/3/1/8/131857758/wazubipagatu.pdf
    • http://duzimoxa.teresawriter.com/uploads/1/3/0/8/130814328/cbcec749d02.pdf
    • http://files.spanishduluth.com/uploads/1/3/0/7/130738812/xivapubeluxuleb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/asynchronous_motor_control.pdf
    • https://cdn.shopify.com/s/files/1/0435/6282/7935/files/java_8_64_bit_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/noxedenotesusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/86914338026.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/49423162759.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/dekojodoxodugezeluduwog.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/wafimowezuruk.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/pufopuxigafatoditemijeku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1600/files/799566494.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_off0000d688.bin
00c8eae40fd4c962350622283754378661a35badd0f692c84ed2319cf97c3242		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 5376 bytes
font_01_sfnt_off0000e8a6.bin
f79eed2be507e3e3f17ba461e6322d5182ef616c229ec0c0e478a20f65a0e093		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 15128 bytes

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