Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebfe89e7a766168…

MALICIOUS

PDF

84.7 KB Created: 2020-08-14 20:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d67d7c8b6d76e9948a63498ea1a2ef3 SHA-1: cf52cce6185bdb34bd34336d2eb66e910868dd56 SHA-256: 4ebfe89e7a766168fe00f8ee526bc67fc28d1c49a6c4442cf65bbb44f228cfbd
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=clozapine+monitoring+guidelines+victoria'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=clozapine+monitoring+guidelines+victoria
    • http://tukiti.kelbryfashions.com/uploads/1/3/2/6/132681504/2755869.pdf
    • http://files.softechinc.net/uploads/1/3/1/4/131453284/wejux_kizowukop_zorigonejujibud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/17684747561.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/53990195502.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/tropismo_tisular.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/mizeresuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/vapovipovuzatotaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/rizovizufifunifatemijut.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/catheter_related_bloodstream_infection.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/amarakosha_in_telugu_free_download.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_off00010c4d.bin
f2005e23bafcdae29d6a12695e2c91a840772158110ab1ba286c72f33903d2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 5408 bytes
font_01_sfnt_off00011ead.bin
adb9c9d2bd2cd3a00c5656779c07ab239d2b0d4646f5c7cef0f22b4b5e99c66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAD 11568 bytes

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