Malicious PDF — malware analysis report

Static analysis result for SHA-256 5780113f269a503b…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 01:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bae426fd2a7e149a63e5615a57d9084 SHA-1: 8dbf3d9405c9f6c335f5927f5497310616e41437 SHA-256: 5780113f269a503b176d61b58bf3ec98ee73821f1e7a610c85568ec1dffb6cd7
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL found in the heuristic firing, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.cc/wix?keyword=soccer+player+weight+training+program
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/gepisaxekewunejigumebam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/30055254967.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zisaruwijur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/ravax.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/bumelurararekozagero.pdf
    • https://static.usrfiles.com/ugd/83f04e_5454dc6f4e1f4e9d9019d3cd860a6be5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c683f470e8d4d2c9afb00afbd6570fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_9efea030c12f4ddcbf79c469a37b49f8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/punctuation_and_capitalization_exercises_with_answers.pdf
    • https://static.usrfiles.com/ugd/8b9728_9c4fae069df54f4d96b8d25bf9f2b517.pdf
    • https://static.usrfiles.com/ugd/cec570_c6cdfe773182431da1fef807b961f98f.pdf
    • https://static.usrfiles.com/ugd/79e5df_bfad8d6e3a514c609f3e6d9f823c812e.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_off00005c6a.bin
e041385106f5ce2e92c3d72ce4e4cc8ea73b5e6f7b063531821eb5bea46f54f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6A 5468 bytes
font_01_sfnt_off00006ed7.bin
40cf36571987c0fcd383092654cd99464e00e1bc46b847c19bfd5904e043d53a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED7 10140 bytes

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