Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85436dc09dd7932…

MALICIOUS

PDF

44.9 KB Created: 2020-08-29 08:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6699258bcb03f1a31c357d8f09025b2e SHA-1: c8c56e43df2678a03a3b317edc0d2d86bd4fddb9 SHA-256: a85436dc09dd79324bff834b14ec89189cc923ca103a27278c63fffce8a10e00
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at 'https://ttraff.cc/wix?keyword=whale+rider+book+pdf'. The document body, though heavily obfuscated, contains references to 'whale rider book pdf' and embedded URLs, reinforcing the lure. The presence of numerous PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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/wix?keyword=whale+rider+book+pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/68059905217.pdf
    • https://cdn.shopify.com/s/files/1/0461/6595/0627/files/vukovolimona.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/organic_chemistry_klein.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fd6fd250e344899e16bdf1cfbd0b62.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6a6978593d34cf9a289c5df23707cec.pdf
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
    • https://static.usrfiles.com/ugd/b8c837_660a542f2a6240eca9ad1025ebc1719f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ad7be5c8a2d49129316fa4099f232aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f0478cb90445b1bd23fb2084d983f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3beb93127da0425f92a487ac8e8380ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_25178991914644e99997a6cde900ad74.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6c540fb377f418ca626bf783993789f.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_off0000723f.bin
8f5a8f4662cf502a9c20dc39bde419ea513da3cf540ae3b0f169743c2e4df667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 5168 bytes
font_01_sfnt_off000083d2.bin
5b787d132313f605fcdfd1917594e3ac20c4ea04f9beadb166f742a5bb18de87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D2 10420 bytes

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