Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6b56fa398438e5…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 12:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afbe12e220bf9a0d9bede717f6989543 SHA-1: 5a54369f0237f3f2cbd6ef00358956ffe1c56cc9 SHA-256: 9a6b56fa398438e50199d6f114fabed657136579bf8b12bc3a479129ba35fd12
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for 'algebra 2 pdf pearson'. No scripts were extracted, but the primary attack vector is the malicious link designed to redirect users to harmful 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=algebra+2+pdf+pearson
    • http://files.itshoursunlimited.com/uploads/1/3/0/7/130776589/nozubo.pdf
    • http://files.sailrockaway.com/uploads/1/3/1/4/131453252/kilajore.pdf
    • https://cdn.shopify.com/s/files/1/0431/4438/0578/files/vugevofiful.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/lenekuputopakopugitemeref.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/171680459.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/7180249981.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/ahs_season_6_episode_2_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/82681534876.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/maths_grade_12_functions_and_graphs.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/36272897774.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/zemoliv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/dexoxekiledisijuxaki.pdf
    • https://cdn.shopify.com/s/files/1/0439/2573/3531/files/bamid.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_off00006ae8.bin
ed1d2353e26152011618c80ec6f25ebe48d4d782ad70d7d15118880b20f63104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 5472 bytes
font_01_sfnt_off00007d8c.bin
0baec2d20df90f4db3429dfde02a7f2fa8650607659348c1bfb4e600cc290dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 10124 bytes

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