Malicious PDF — malware analysis report

Static analysis result for SHA-256 3053c52a5732231f…

MALICIOUS

PDF

39.1 KB Created: 2020-09-01 00:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4626482a0d33ed93620f0f55187f858 SHA-1: c7f74d4e941ddaa21cc6e5fb7046b4cab7b11949 SHA-256: 3053c52a5732231f531ea82af2c319a2fb34b0264bab163d96e21f2b3ab3e2c6
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.ru/wix?keyword=ground+sheet+anaconda, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the attack pattern.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/wix?keyword=ground+sheet+anaconda
    • https://static.usrfiles.com/ugd/9421c8_f6e0bafaa9df43bd9650540aee90874a.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_8d3aad38c0f0420e90d99eca3a9a58fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/32291207020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/c_n_g_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0462/2585/0519/files/aruba_3810m_stacking_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9c578f1fca946be8a8148f259330973.pdf
    • https://static.usrfiles.com/ugd/345929_f014b7924e6849209f5a94bb5a6117c4.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_off00005c2c.bin
087c28ace13065b2a17a162f73d1d902a25bf0e242d01fe5bd7fbc06df0aa2e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2C 5028 bytes
font_01_sfnt_off00006d3d.bin
b33a953c2e1349edd6be86bee14c12c7387c15014d6a62d42a99a3231777ebb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 10324 bytes

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