Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abccf96bfa12344…

MALICIOUS

PDF

49.2 KB Created: 2020-08-15 11:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a6fbce4f0e2d43831ed43d30f5d73e SHA-1: 0d83cf58eddc96a37bfc795298e9e001f75ec8aa SHA-256: 0abccf96bfa12344baa826e35ef9151257caf0c6f45a6fef0a917189cc21d1cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, appears to be a lure related to nursing administration, suggesting a phishing or SEO spam campaign. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=administration%20and%20ward%20management%20in%20nursing%20pdf
    • http://pedakix.alliancebravesbaseball.com/uploads/1/3/1/4/131407406/jupilusebedoj.pdf
    • http://files.pipinchicksilkies.com/uploads/1/3/1/4/131482991/zuzekalidajutisebare.pdf
    • http://files.harveyhensley.com/uploads/1/3/1/4/131452887/3952980.pdf
    • http://files.seattlegolfnews.com/uploads/1/3/1/1/131163737/1925660.pdf
    • http://files.leesburgheritagesociety.org/uploads/1/3/2/6/132682787/togax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/94966153362.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/27153551062.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/95635039138.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5196/files/websites_without_http.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/rebupeliwafusolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/zugitelemagas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/posidepobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/9938496672.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/25785856195.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e4.bin
f1a3233a52cc1c3bd5c219ae9cf1a22df5e128e0d0602a1bdc5706cb666711c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E4 5408 bytes
font_01_sfnt_off00007a46.bin
8e023654a5b050762bd5bc5c1a895f5b8be525b3b2ea00cac1a8d3902ad73646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 12484 bytes
font_02_sfnt_off0000a20d.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA20D 16164 bytes

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