Malicious PDF — malware analysis report

Static analysis result for SHA-256 82acc3144b53fe97…

MALICIOUS

PDF

66.7 KB Created: 2020-08-10 13:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ab42beabab473be5548633e17591a7 SHA-1: 602c0b3969beda3adea380060de006cfd9e0dc17 SHA-256: 82acc3144b53fe9762a01359ebea906017f5e87bdaf5fbe0a030d930d23f2e46
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.com/pify?keyword=argument+essay+graphic+organizer+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be part of a SEO spam or redirection scheme. The presence of numerous links suggests an attempt to drive traffic or distribute further malicious content.

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=argument+essay+graphic+organizer+pdf
    • http://files.cletushull.com/uploads/1/3/1/4/131438098/d89179caf.pdf
    • http://files.deltasierracds.com/uploads/1/3/1/3/131382141/zasibevi.pdf
    • http://files.thebearstfriendsfurevershow.com/uploads/1/3/1/3/131380871/91c2b5b559.pdf
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/77423984786.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/94013704170.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/52537487387.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/84966555417.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/10965278772.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/tixurefigowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/musesilided.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/mowul.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/30805866492.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/65008582202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b227.bin
cdf05fe35e31cd4a0a84d52bc345acbfc5bab7690bea07aa4e57742a8916d990		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB227 5680 bytes
font_01_sfnt_off0000c55c.bin
4df3297ac7863b11a66a1eebf65cd6ad3d241040ecebd0a6dcdad6965a4a9a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC55C 10084 bytes
font_02_sfnt_off0000e826.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 16204 bytes

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