Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b761b09f7d2aa1b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 22:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f1b65fd5ded888fcf903202c7b517b SHA-1: 34871bb909894566fd35ee7879adbb2d779a7c62 SHA-256: 4b761b09f7d2aa1b6eda53ca57eeeafe604a1466433817779192a2045f6651da
150 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 PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=yusuke+vs+toguro', is identified as a known malicious redirector. This suggests the document is part of a link farm designed to distribute malicious content or lead users to phishing sites.

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/pify?keyword=yusuke+vs+toguro
    • http://files.rochelthewriter.com/uploads/1/3/1/4/131437670/tumemazas.pdf
    • http://files.smcteamc.org/uploads/1/3/2/6/132682585/vipilamaroxobuxer.pdf
    • http://files.querubicamp.com/uploads/1/3/1/4/131453543/6458999.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/23401531645.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/gixiwizoxelulidaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/lusazadototamokizupezazik.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/xakufekuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/xegobetoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/wovofopuvipofuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/diablo_3_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/4616861290.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/30043394949.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/sorewibolukobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/bavukupetat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3222/files/30273558062.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_off0000675b.bin
728e1663b3da7f95809816e8e6a21cde533b6666deacd03a9b77d9410f0920ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 4696 bytes
font_01_sfnt_off00007770.bin
17324a747604dff13e917eac51a6bef5483529b78ac9afe39b05eff8da1de0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 9764 bytes

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