Malicious PDF — malware analysis report

Static analysis result for SHA-256 9339944e059f1f65…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 19:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b10fa31631e7e86c12f86065016f99b SHA-1: ea2178340e901a4f29eb16b897a42894540c513a SHA-256: 9339944e059f1f654ce24085f23e0ec5e0aad2566105d541f4357d24e8193342
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious infrastructure. The document body is heavily obfuscated and contains the malicious redirector URL, further supporting this conclusion.

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=analysis+of+algorithms+pdf+sedgewick
    • http://files.priorityonesurplus.com/uploads/1/3/1/6/131606491/lodinijotuzoli.pdf
    • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdf
    • http://files.nonsportcardshows.com/uploads/1/3/1/4/131438071/sibagejipovez-rofaxodoseranol-wekaxiw.pdf
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8458/5883/files/fifaxezijijirapiwakop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/8326941084.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/21209550177.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/96550126187.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/3270796036.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/44197574416.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/11632372277.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/96952480864.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/60596646404.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_off0000638e.bin
e38f101135123db065c36fd8a91d720ab6dc8cb0bd34596f32cdd126e2f73935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5816 bytes
font_01_sfnt_off00007751.bin
8a844728d802927223399fb51176317eccbe81e46150ed0e9015227353168cc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 10080 bytes

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