Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b47a0c67d4a52cd…

MALICIOUS

PDF

46.6 KB Created: 2020-08-24 07:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c436447b213193a3d7e6bc4001e0c626 SHA-1: 4306c0f8d4a574f770e91f6d26dab282b02d1477 SHA-256: 8b47a0c67d4a52cda7adc057da6723f5e05fd208dbbfc00d3246e4381b345897
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains the URL for the redirector. This suggests a phishing or scam attempt where the user is directed to malicious infrastructure. The presence of a link farm heuristic further supports this 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.
  • 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/pify?keyword=afghan+old+songs
    • http://gubeda.bluebutterflycoffee.com/uploads/1/3/0/9/130969483/larebodanoxezoboga.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/jixamanada.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/xedesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mevuxibuvijufapaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/dexowuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/86016502645.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/64900985768.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/99103396788.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/jelly_sheet_mask_collagen.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/33690120777.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_off00007a5e.bin
59ae0d29bc9ca10adec6b4f9423b2ca226953098809d882d26b046c07a2242f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 5060 bytes
font_01_sfnt_off00008b98.bin
592c06300a2f0acf5200ab299ca363c64d60431322cf704d23a04bbd37e20b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B98 10100 bytes

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