Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a79109051729164…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 22:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ef29ee6f64ebc55717be25f8da8ab9 SHA-1: 57bda21d152d97a0b6897205026c522ed7bc79a5 SHA-256: 9a791090517291644a92a9f942999441dd32a08f420e8b881b91dc6ee2bd6888
120 Risk Score

Malware Insights

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

The PDF contains a link farm with 26 external PDF links, many of which are generated for SEO purposes. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'Bose soundlink micro manual pdf' and the malicious URL, suggesting a lure to trick users into clicking the link under the guise of downloading a manual. The PDF was generated using wkhtmltopdf, a common tool for creating PDFs from web content.

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.cc/pify?keyword=bose+soundlink+micro+manual+pdf
    • http://jegakig.vellfitness.com/uploads/1/3/1/4/131437363/zevopol.pdf
    • http://files.navarrepenthouse.com/uploads/1/3/2/3/132302960/2713146.pdf
    • http://files.elyse-interiors.com/uploads/1/3/1/4/131454316/niwaleri.pdf
    • http://jegakig.vellfitness.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/characteristics_of_an_entrepreneurship.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/define_orthographic_projection.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/gunatafolafipikasiwujogi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/genijod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5189/2381/files/98701714827.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/credit_card_authorization_form_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/62648735505.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/41637435198.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/luvituzonodadobisonuboke.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/jagarodutedexatolofurezob.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_off0000639e.bin
091bc7a2774fbcf1f51a9492a678511f7c1f429f3d1e94da603e2768a5a8af47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 5416 bytes
font_01_sfnt_off000075e8.bin
6d68ddc4dfdfb603caa40d94c8730e9bdaca7ddfe14f549e7819bbb9675e32dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 10148 bytes

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