Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14c54e6aa682282…

MALICIOUS

PDF

49.6 KB Created: 2020-07-27 16:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020353ef0acc87528675b91f89d1bf8e SHA-1: 712a354e85dc0bdb2af3d0c3b98ab62046781e17 SHA-256: c14c54e6aa682282c81fd704085cc7962034d78e97b01c25a35c429e25332b72
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a keyword search, suggesting a lure for potentially malicious content.

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.ru/pify?keyword=root+android+tv+box+l%25C3%25A0+g%25C3%25AC
    • http://files.listerfluidpower.com/uploads/1/3/1/3/131379719/xigaw.pdf
    • http://files.eyretonponyclub.com/uploads/1/3/0/9/130969153/7674e0e5b687.pdf
    • http://files.flouriche.com/uploads/1/3/0/7/130776611/a697518dd504.pdf
    • http://files.listerfluidpower.com/upload
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/48384656893.pdf
    • https://cdn.shopify.com/s/files/1/0436/5906/7550/files/46082095176.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/timutarame.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/2833201054.pdf
    • https://cdn.shopify.com/s/files/1/0437/4501/8017/files/kamapitosulako.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/76898737793.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/37379170691.pdf
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/fugosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/73105700785.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/40012371696.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/32664844569.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_off0000837a.bin
91e27e786de4f2f9417c131f612ca5d18f08453685d0073d3d955314062a0fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 5048 bytes
font_01_sfnt_off00009420.bin
13ffc36e840b3515bf9312e1130687a4bc3e3a72183043b0f0c0cba709c27dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 10316 bytes

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