Malicious PDF — malware analysis report

Static analysis result for SHA-256 39510f8c367021b7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 11:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c344c80e6adc37db0a35bbe59999529f SHA-1: c6469a6f73f2a8cf9922cd996d8446b05bf161ce SHA-256: 39510f8c367021b77c78930a136e3dd4f5e9e9640d6016267634864a7e76159b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a '500 piece tool set' and includes the same malicious URL. This suggests a phishing lure attempting to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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=500+piece+tool+set
    • https://static.usrfiles.com/ugd/b8c837_255a84215a284ca88d45dcb08a210a2e.pdf
    • https://static.usrfiles.com/ugd/05900a_3971700d68584db28365b3b19a8d3fc2.pdf
    • https://static.usrfiles.com/ugd/4f270c_5d93d85f2b4c4541ac84c43f9a509e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc0d5fcb8a44494abef368e060e3a4e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/wukajelidama.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/listening_answer_sheet_british_council.pdf
    • https://cdn.shopify.com/s/files/1/0463/6157/5579/files/minew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/gomitemif.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1c8d50071d948eb9fd9ccfb184bf6f0.pdf
    • https://static.usrfiles.com/ugd/f46427_1240da935708469db0eafe51af98b235.pdf
    • https://static.usrfiles.com/ugd/4b7290_d9627e43c6ce4d90a2ea937f7d2ad35b.pdf
    • https://static.usrfiles.com/ugd/e3325f_454a1793dc734b30944aa33a1d626930.pdf
    • https://static.usrfiles.com/ugd/1decf9_483bdf856b3c4db4a6eb0ee801fc8a89.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_off000066ac.bin
f6fde353d2bffebdc44e7cd0e3f6884330dcfc46c61f41467f7fcaaf65434a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AC 4792 bytes
font_01_sfnt_off00007703.bin
53edcba65df5eee7c8b5cade5b3730be666516a0d32c2d6b54c61fda81c0573d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7703 16204 bytes

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