Malicious PDF — malware analysis report

Static analysis result for SHA-256 4647f31388a7dc7a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 22:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e4481d961934542f2c9a0d2adbd8d00 SHA-1: 1cf7977a1f2d516615c97b7fd1527f9ff03a4601 SHA-256: 4647f31388a7dc7a8b59a42c2c71e3438e0bd0fd44fc0f066a0211c2121a2cd3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs. One of these links, https://ttraff.cc/wix?keyword=complex+migraine+news+reporter, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a tactic to drive traffic to malicious infrastructure. The presence of a link farm heuristic further supports this. No scripts were extracted, limiting the analysis of direct payload execution.

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=complex+migraine+news+reporter
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/jimexoweti.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3036/files/wixegasulevoxenidojal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/halfworlds_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/zubifoguwegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/17173599934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/vita_con_lloyd.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/31715031665.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bea4a461d9d497e95025f9ffc078a22.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://static.usrfiles.com/ugd/74c34a_7a4bed70b0594d15a0b24c2ab7c27c95.pdf
    • https://static.usrfiles.com/ugd/0a593f_65e1c46fa5fa4464b7a1b002f4a42715.pdf
    • https://static.usrfiles.com/ugd/b916f4_d5209ac6f2ac46f9a9ae2fff5073be20.pdf
    • https://static.usrfiles.com/ugd/12745a_a992e41e6439423888297ba30d0914f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_86313ea7cb184f0ea31e33c1249df491.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_off00006496.bin
280480ad4df6703d2194f5634f6d41b705290d14091513a27f8d261ee814d2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 5204 bytes
font_01_sfnt_off0000764a.bin
7a8eeda65877765d11dc1944964c2bcc47936aec8a5cf8e3e5a190655761b2b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 9900 bytes

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