Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d43e99367f96a3…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 21:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44b8a0f891446cf2b84065ef096692d SHA-1: 29bd21a42b927c3757fb4278a8c76664405d12cd SHA-256: 54d43e99367f96a3ecda0e71ab21ec9683f1a9a3aea71d5aab5b2e4f541a5985
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=ruh+sa%25C4%259Fl%25C4%25B1%25C4%259F%25C4%25B1n%25C4%25B1+etkileyen+ki%25C5%259Fisel+fakt%25C3%25B6rler+nelerdir'. Additionally, it features a PDF link farm with numerous links hosted on Shopify, likely to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=ruh+sa%25C4%259Fl%25C4%25B1%25C4%259F%25C4%25B1n%25C4%25B1+etkileyen+ki%25C5%259Fisel+fakt%25C3%25B6rler+nelerdir
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/biggerpockets_ultimate_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0457/8705/4246/files/chess_games_database_pgn.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/43816497603.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/65616394529.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/16014861511.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/kobibogazasivapolup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/jolirevibuwegube.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/biology_class_12_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/16479736856.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/dinisezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/7185206494.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/2597149831.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.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_off00005d00.bin
1ec6b9534466248dcffd0acf53ff12adf7383474ca2121b42d1df8a0c2a6e762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D00 5816 bytes
font_01_sfnt_off0000700f.bin
badf353a6f460f71daa157f667488e590515bb67b51ea4f9ebb33b0a6b0f1f30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700F 10644 bytes

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