Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ca0dcac74b75f1…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 14:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1451a1ad1971de4384850748bf79dc SHA-1: 8a7a6f76c30b36d12fdbcf12a3f34687745370bb SHA-256: f5ca0dcac74b75f1f915ccc3c310fcf7391266201670d3d2d193673b46e3da25
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.com/wix?keyword=becky+g+latin+billboard+2019+performance`. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to manipulate search engine results or distribute malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=becky+g+latin+billboard+2019+performance
    • https://static.usrfiles.com/ugd/5438e3_043b0287939d4048936cd1f51163d359.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a16c96112e843a8bfeef89f46da619b.pdf
    • https://static.usrfiles.com/ugd/3e87bf_bfc28eaad0634a059d9078ae70751426.pdf
    • https://static.usrfiles.com/ugd/8d57bd_3baedf049b9b415ab2f592d43f892fb6.pdf
    • https://static.usrfiles.com/ugd/de3d83_e44adba8deae4e4cb4ba92ce58a92efa.pdf
    • https://static.usrfiles.com/ugd/b8c837_d219fdc08f494ef79aaf6cce830f7a07.pdf
    • https://static.usrfiles.com/ugd/b8c837_c263528a7c924f2cafb1adabde3828a9.pdf
    • https://static.usrfiles.com/ugd/37321e_055b7328cfcc414c91936d292c5276db.pdf
    • https://static.usrfiles.com/ugd/b80405_b4e741bc489045e8a7f57856841e04c6.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_off00005949.bin
07aeca18e50e4ecfd742a02325088804725749f7c05305e85a7d60381e1729eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5949 6136 bytes
font_01_sfnt_off00006e28.bin
0ce2bd7db98164c5cdd057cf9043ef66916114c21331168fd709e40cff493aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 12444 bytes

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