Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eba8edd842cbe07…

MALICIOUS

PDF

47.0 KB Created: 2020-07-30 02:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18b1832cf89f1a7aef6fdf8afecc983 SHA-1: 86b473d517ffff33a66f941e28845ea0afe6bf25 SHA-256: 2eba8edd842cbe070be0cbb2b0136acea57560c6625f4ef8467bf8cc21752fc0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to what appears to be a link farm designed for SEO manipulation. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the link-based attack vector.

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=lipid+profile+presentation+pdf
    • http://files.almostsponsored.com/uploads/1/3/1/6/131637043/7163544.pdf
    • http://files.cookbuilderssupply.com/uploads/1/3/0/8/130813923/8880bc7b4.pdf
    • http://files.tworiversrecovery.com/uploads/1/3/2/7/132740860/91cf8adff.pdf
    • http://files.calallenfootball.com/uploads/1/3/0/7/130739093/e7f2a4927176f98.pdf
    • http://files.carycalhoundesigns.com/uploads/1/3/0/7/130776088/dodolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/gitixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/nolukale.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/kosifoforepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/9039736813.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/26062625088.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/91648085670.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/wefedabedigikuvejaru.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/69246539221.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/97798700340.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072a2.bin
4b3694c6baffa2cd577f8d5459049fb77cf4c2f7d0418bda93a614862aaaa52f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 4764 bytes
font_01_sfnt_off000082d1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 1800 bytes
font_02_sfnt_off00008b5e.bin
0aca4f338a7a2669f0161db6498f905150e89c21c5f1f9be7a36cec5891f3c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 10364 bytes

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