Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e50b5fb23c9fef…

MALICIOUS

PDF

285.1 KB Created: 2020-08-30 17:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6745eb64a1ff153b6f725a724e7a991 SHA-1: b9db3d206197307016d6a41143ebf2eb5b02fe59 SHA-256: d0e50b5fb23c9fef0514ff557d0af579ec3c0106a1836b55c8f1c787d2a3e3fa
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/wix?keyword=hoi4+updating+history
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/exterior_angles_in_polygons_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/7104/3739/files/introduction_to_food_safety_and_hygiene.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/7871078368.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bc83b541424a16a5283b75bd9271d1.pdf
    • https://static.usrfiles.com/ugd/136d07_e11007789a894048906bee9348324931.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ab413d9a17c3440d8b0bd61ada65659d.pdf
    • https://static.usrfiles.com/ugd/b8c837_616489f646b44c4f97f250f1b4d87860.pdf
    • https://static.usrfiles.com/ugd/625844_bdd41d59a9e04733adabd26c0e5c2694.pdf
    • https://static.usrfiles.com/ugd/1f2646_e609760b83df4590b55f2a22c0abae60.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa32e7286ed54b8caacc51df05390803.pdf
    • https://static.usrfiles.com/ugd/d902bb_ed7737d011d64cd9ae87a99e44db3997.pdf
    • https://static.usrfiles.com/ugd/b8c837_2add61c2764c44468a3083442cb4b740.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_off00040866.bin
965baf1acacc3791878f48f20fc0e78c1f13d87dd4289ca9d3316f82ff846df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40866 5340 bytes
font_01_sfnt_off00041a89.bin
618906a9c39c5739b226af90c4e44709fc3df2937cc1a2edefde1f8d8a016b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41A89 17832 bytes
font_02_sfnt_off00045192.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45192 16204 bytes

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