Malicious PDF — malware analysis report

Static analysis result for SHA-256 911f89e1eccfbad8…

MALICIOUS

PDF

48.2 KB Created: 2020-08-08 15:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 710332c26a92b7c9435d6919060b6106 SHA-1: 1cdf70bdb9699e6610b6e3a67a1d11a1a02ea316 SHA-256: 911f89e1eccfbad8e425094cb59eaca1514a0132765c6c274707be14f29b1a3e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=binary+addition+and+subtraction+rules+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains this URL, suggesting a lure to trick users into clicking it. The presence of many external PDF links also points to a link farm strategy.

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.com/pify?keyword=binary+addition+and+subtraction+rules+pdf
    • http://pivuxaw.damianduguid.com/uploads/1/3/1/3/131398140/3102564.pdf
    • http://doxito.kamscare.com/uploads/1/3/1/0/131070420/38ee3a.pdf
    • http://files.relaxandsucceed.net/uploads/1/3/1/4/131408100/c02cfa4e0655a1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/renujaramoxumugas.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/napawawol.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/33156777931.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/47047128755.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0070/files/jezufexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/64996015166.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/pizapitof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1125/files/lugawudemozewolakusoro.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/17572418447.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/72916243012.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/apgar_significado.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_off00007f77.bin
dbd2b5ba832ab74e12e1df0a8ebcef446fce4be2f9a66873bc79b49ab613d40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 5440 bytes
font_01_sfnt_off0000920b.bin
5221ec7826eab7d2c3d6575011047a9db3bcfe28f45f7e3a642203c6007bfb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920B 9816 bytes

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