Malicious PDF — malware analysis report

Static analysis result for SHA-256 992871fd66bd9cec…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 08:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86a3d3b33238287990727a10acfee40 SHA-1: 167eded5090cb625fe3ec51ccf3d5e858923852a SHA-256: 992871fd66bd9cec45443178173258885ac9da48d8890b44cc79fa907ceb0ca3
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 of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or obfuscated, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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/wix?keyword=granit+mutfak+Adas%25C4%25B1+tepesinde
    • https://cdn.shopify.com/s/files/1/0438/7821/9944/files/canadian_citizenship_photo_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/watch_teen_wolf_season_1_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/aleph_paulo_coelho_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/js_concat_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/vifatobevefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/policrestos_homeopatia.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/palikorovalelibizakepujeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/lozevon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/19268452342.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/jibigodikutusumiwowujaros.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/tobubiti.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_off00005899.bin
6d66752a362b00bd3ea527a35feb81b12c5d2e22bc3404e21f3990f7e96f28cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 5368 bytes
font_01_sfnt_off00006ad6.bin
21100ac1d92908a3d22cc08c501863e17c86c36709ce481a02b70b31d789c985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD6 11388 bytes

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