Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32a5ccad1e96221…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 11:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4425fc2e6a220d279438d0f3f4991ba SHA-1: f62b41f6a7091cacf613b305dc24b27d3be71731 SHA-256: b32a5ccad1e962213cfa190ad40a5083c8ec4837879e8f711c0d06671595602a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Indesign pdf' and a URL that appears to be a redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted, and the primary malicious activity observed is the redirection via embedded URLs.

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/pify?keyword=indesign+pdf+with+bleed+and+crop+marks
    • http://files.ulcel.org/uploads/1/3/0/7/130739986/kaweripimotonox-jenat.pdf
    • http://files.authorwilliammartin.com/uploads/1/3/0/8/130813841/miwudede.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/53327302568.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/8593599696.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/statistical_inference_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/14017830030.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/engineering_drawing_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53151925343.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/78011764566.pdf
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/poweredge_r640_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.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_off00006bf1.bin
5b77f97ec5e7f60f29c13346a4e027371e2435d85c5489d9d34474a8c54faed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 5804 bytes
font_01_sfnt_off00007f8b.bin
b36bc0ea0721e07c3a706ff7cefdbb40477838cb9d91f6c5e34b172aa1124c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 10192 bytes

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