Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bd43fb8ca78987…

MALICIOUS

PDF

55.0 KB Created: 2020-08-30 19:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a08d5d6bd595e1b955bcd6ebf61969e SHA-1: ea2b0406369a396ca5267b5d9350928c1e953c94 SHA-256: d7bd43fb8ca7898717d5ebdd8c07642790782c251fb8f58c1667ac7559ba5933
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. The PDF also contains a large number of external links, indicating a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=beard+trim+guide
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/sekugusufokunameku.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/54552675105.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/basic_of_c_programming_language_tutorial_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/bodybuilding_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/bug_out_bag_checklist.pdf
    • https://static.usrfiles.com/ugd/cafc24_74986166a969418891d430c11228aec5.pdf
    • https://static.usrfiles.com/ugd/353d00_f5be22497d744089a50243aba618c43e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/85660726651.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/download_foxit_reader_for_windows_xp.pdf
    • https://static.usrfiles.com/ugd/3aee12_44fe1032b1824eb78fa46e2d1be21bbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bf05d33aec643fbaf93c37a4d577458.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e02755ea7f64cb2ba3cd4a7f15fa134.pdf
    • https://static.usrfiles.com/ugd/b8c837_117d75b6444e4070a4938bab2526fbed.pdf
    • https://static.usrfiles.com/ugd/6846fe_86427a74036042f689e85fc09e1efa36.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/
    • https://cdn.shopify.com/s/files/1/0436/2423/517

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a0e.bin
8e990bebbf96ca12465ca1b1c417a4dbb82bfaadbbc92bc32fa9d6c768f76a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0E 4984 bytes
font_01_sfnt_off0000aae2.bin
1eacf8d74d29e4c901e624cdd2bcb9f2853e1222a6e6c36bae714e0b623597d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE2 10608 bytes

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