Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ee4c9f2ebe68b8…

MALICIOUS

PDF

41.5 KB Created: 2020-07-31 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf703e111df44820ffaf64b582467db7 SHA-1: dec4dce840fdcd3d155fccadd6b121c83007de4a SHA-256: 32ee4c9f2ebe68b87eb7d069094a7ab06d5506b9a674960f1ca7ae9a9838b2aa
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, appears to be a lure for a 'ccna book by todd lammle pdf free download'. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

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/pify?keyword=ccna+book+by+todd+lammle+pdf+free+download
    • http://files.alzheimersocclub.com/uploads/1/3/1/3/131379253/nedafekokedut.pdf
    • http://files.montessoricenterofjackson.org/uploads/1/3/1/0/131070762/65d8208ed76b86.pdf
    • http://files.gallerysixtyfour.com/uploads/1/3/0/7/130738933/guwirexuwu_tesafateb.pdf
    • http://files.nhsnpa.org/uploads/1/3/1/4/131437308/5e1f8bd84c3cd.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/wolebepasixekavakagumugij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/xilenebakotamig.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/31024847434.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/nunudodozuvizupaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/37739951465.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/32259354927.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/30106679236.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/fanorexagodivefite.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/80656845977.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/23011548154.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/1/0435/3222/2615/files/nunud

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063df.bin
cba8617011475b73953148ff2e143c75beed50d340a2f7fc9aabc3d5e1cf59c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 5284 bytes
font_01_sfnt_off000075d3.bin
147512bff2f96affb8bde4148b3d97d2a788ab362abf93a8b939301a62517fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 10228 bytes

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