Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06b8640bdba8083…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 07:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcbe947fefed01933c8ab7f377146855 SHA-1: 825b586ad995fa17d275ce353c8a377cd8870590 SHA-256: c06b8640bdba808386fecad8684182893b90a5331fa87384f2abfd1c47611d2c
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'logo pop quiz answers' lure and a URL that matches the malicious redirector. The primary attack vector appears to be social engineering via a deceptive link within the PDF, leading to a malicious site.

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=logo+pop+quiz+answers+level+7
    • http://files.eyehearmusic.com/uploads/1/3/1/6/131637606/3214911.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/fagefidedosewikap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/81927317278.pdf
    • https://cdn.shopify.com/s/files/1/0433/9833/2565/files/vatoberapenamusul.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/9431479018.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/37714617336.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/liderazgo_autocratico_y_democratico.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/vidusebito.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/teaching_phonics_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/juvinora.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/chrome_certificate_windows.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/69439624749.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_off00005f99.bin
12776f849a1e8d3a69f2d4f9b349a0d2ee8b5c38dc0660d87706fcf558de3be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F99 5336 bytes
font_01_sfnt_off000071fa.bin
e94abace4e7024e0960ec75bb6768cb0ebe3506c09ac8ce309abb5898784a134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 10140 bytes

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