Malicious PDF — malware analysis report

Static analysis result for SHA-256 b708b4019bc5bbf2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-02 19:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fdbbc833ef3d767dcaf1781479f9e8c SHA-1: f857878922635bf7e6a4854a863fcf5f5a4d93c3 SHA-256: b708b4019bc5bbf2585aa9d771749e48b15a45b3a849dad23b3136c5738028ae
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains a reference to 'action figures price guide' and a URL that aligns with the malicious redirector. The heuristic firings confirm the presence of malicious redirector links and a link farm structure within the PDF. 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.com/pify?keyword=action+figures+price+guide
    • http://files.triciashope.com/uploads/1/3/0/9/130969742/naporis.pdf
    • http://files.octopushairdressing.co.uk/uploads/1/3/1/0/131071037/4020924.pdf
    • http://files.boehle-fotografie.com/uploads/1/3/0/7/130776268/mesudiwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/nadekufumawidemasab.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/90560438698.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/61046189056.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/jenejifusozaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/94165072320.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/8885129528.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/xuwesibefuwopula.pdf
    • https://cdn.shopify.com/s/files/1/0439/7383/6958/files/roll20_drop-_down_prompts_calling_other_macros.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/83261809790.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/48873193101.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/benibuvabe.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_off0000666c.bin
bdf0e7fdaad6ab6bf9fc35288b2665d24c15c476cc184a06b935770103817eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 5068 bytes
font_01_sfnt_off000077c8.bin
c78e37352e76cfe768c3d1297e856d337ce7ce6d8793acb71c77b91afebd375f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10856 bytes

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