Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b8fbdd4b09d3c9…

MALICIOUS

PDF

67.2 KB Created: 2020-08-02 14:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba636c0ae4e2e5909797adc5fca5360f SHA-1: 62ae68d91f4381e30b76eb7aacb581c57f8ab653 SHA-256: e8b8fbdd4b09d3c942f5429674aaffa88bbf6de3922f62785fb72a8a7157bc9f
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=bishop+bullwinkle+mp3', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the intended lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination.

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=bishop+bullwinkle+mp3
    • http://files.ftfundraising.com/uploads/1/3/1/4/131407164/sumupetafetixuzewura.pdf
    • http://files.openingnightcostumes.com/uploads/1/3/1/6/131637218/5859254.pdf
    • http://files.eldersolutions.org/uploads/1/3/1/3/131380005/jalesatetokamepejeri.pdf
    • https://cdn.shopify.com/s/files/1/0440/0221/4046/files/riwemisisu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/87483818217.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/kesogofibes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/trane_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/kms_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/hayward_multiport_valve_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/93941229839.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17524121831.pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/41105935519.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/58185961073.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/pesajenoti.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_off0000c41d.bin
8e55871b67689f6f47f879c6f4fe4bbff5b46533a3d296251344617538e893f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC41D 5260 bytes
font_01_sfnt_off0000d5f8.bin
babf0e8cc5b8f7e72d3ce8ac6c9cbc88226a14859788125e4550cdd13d34571c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F8 13000 bytes

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