Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b811baa0d1a0dd…

MALICIOUS

PDF

62.3 KB Created: 2020-08-09 13:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04f68a1096ceb559b26f11f70a86e6a8 SHA-1: bf3a91789f4c311b9cb2c0d8241a3eec6de55210 SHA-256: f0b811baa0d1a0dd60fb12e7f1a3b2b0e15e206cac557304e93383852e05c075
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'boxing training exercises pdf' and a URL that appears to be a lure. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a phishing lure, directing users to a malicious site via the embedded link.

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=boxing+training+exercises+pdf
    • http://fedamewaf.walkersonwater.com/uploads/1/3/0/7/130739430/9029011.pdf
    • http://files.highpointacademy.com/uploads/1/3/1/6/131637419/gapob.pdf
    • http://files.oliviamarcellay.com/uploads/1/3/1/3/131398084/zulag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/85896648082.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/widifewodafazalaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/1_kg_to_lb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/77484959286.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/77870848856.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/mobifufovolep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2323/files/kedajelanewije.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/jimolak.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/66183008565.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/96268028493.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_off0000b5c6.bin
2fc00ff963d9d4e82676cd77fcdcf43f93ae1b317ad27320267d697a5fb214be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C6 5408 bytes
font_01_sfnt_off0000c848.bin
3e0eadb3c30f6dcc6208d21c59c0c2db223d569ec6b5394f33ec34ff346d2901		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC848 10524 bytes

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