Malicious PDF — malware analysis report

Static analysis result for SHA-256 303ab320dfa0e48b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-30 15:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06624170dfe9dcbba183caae7ca327c2 SHA-1: 14a531aa3613d6da66dfd27b0d66d32e0833c30d SHA-256: 303ab320dfa0e48b53155edd839f1b9cb0d320d058e0f7e7bb9c061f660a70ea
150 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 pointing to 'https://ttraff.cc/wix?keyword=savitha+bhabhi+pdf'. The document body, though heavily obfuscated, also contains this URL and references "Savitha bhabhi pdf", suggesting a lure. The presence of numerous other PDF links, while many are benign, indicates a potential link farm or redirection strategy. 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=savitha+bhabhi+pdf
    • https://static.usrfiles.com/ugd/80bfa9_9edc11da9a844b06ae3a7b36fd20f71c.pdf
    • https://static.usrfiles.com/ugd/96768c_618cf5530bbe4594a3bfd0940ac524f8.pdf
    • https://static.usrfiles.com/ugd/5926b4_4a47be584621447eb7fb40cde526bea4.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/subject_verb_agreement_worksheets_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/89930216717.pdf
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_39d35689cf7343b5be459bd2bf20f237.pdf
    • https://static.usrfiles.com/ugd/b8c837_60789c81462d4bb8a0df1d37f5782e56.pdf
    • https://cdn.shopify.com/s/files/1/0436/5657/7182/files/42451862499.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/carve_the_mark_veronica_roth.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004679.bin
75bdb4ebe37ce142987efde97df00c9a213bf44a71eeb546a16cba7ed2a06289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4679 4580 bytes
font_01_sfnt_off0000560a.bin
5868b430abd646655835b61888f3cbb727d4c4ebae12eaecc56eef6df30e4cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560A 9100 bytes
font_02_sfnt_off000073c2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 4324 bytes

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