Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c655e2382d6f18d…

MALICIOUS

PDF

40.3 KB Created: 2020-09-20 01:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 991e9bfbe962831648ae29c38dee86de SHA-1: 59d14b39d1bad665ebd1a876e5bff71469952699 SHA-256: 4c655e2382d6f18d00070f464c875e251dc887c5009b9ec0eb2af313d5b0fe1f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=andrew+jackson+and+native+american+removal+worksheet+answers', is likely intended to lead the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=andrew+jackson+and+native+american+removal+worksheet+answers
    • http://wakowared.onpurposebranding.com/uploads/1/3/2/7/132741136/fc8fd603ea.pdf
    • http://bopeg.knotanddagger.com/uploads/1/3/1/8/131857334/314341.pdf
    • http://defodas.glendaleartassociation.com/uploads/1/3/1/8/131856772/ruluwuzavezati.pdf
    • http://zozuvovir.bagusnugroho.com/uploads/1/3/0/7/130776674/521a32.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/printable_coloring_sheets_for_3rd_graders.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/fadujadalakejedobofob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/foundations_of_early_childhood_education_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7251/files/27369358799.pdf
    • https://cdn.shopify.com/s/files/1/0483/1648/1699/files/53777656437.pdf
    • https://cdn.shopify.com/s/files/1/0485/6679/6453/files/34498070467.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_off00005f06.bin
823f0d36e8feb18a2a339b56204bdefdd908ff24828e83f4cf7e9c36818be8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F06 5460 bytes
font_01_sfnt_off0000718b.bin
9c5e291f310e2310ab8690dc604fb284f5c626232860e0be5ec5c3e9379570cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 10148 bytes

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