Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f59baf2f9cb8839…

MALICIOUS

PDF

43.6 KB Created: 2020-09-12 00:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae9e2d5fd60ac9234c5cb7757087f559 SHA-1: fbb2aae671628adec61f7f9a19f1a7d9e244bc77 SHA-256: 9f59baf2f9cb8839db141f1c25d311a2ef4aef22d53e778418d6f3d022389b79
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.club/wix?keyword=army+photos++full+hd
    • http://files.sarahelizabethaldrich.com/uploads/1/3/1/6/131637546/3466707.pdf
    • http://jusitina.forasong.org/uploads/1/3/1/4/131453247/3660582.pdf
    • http://files.institutselmane.com/uploads/1/3/1/4/131407089/8fb153c527742a3.pdf
    • http://xozat.bestbodyfitness.net/uploads/1/3/0/9/130969594/dugozafopipav-dowuxuwas-guxiwirasapawi.pdf
    • https://static.usrfiles.com/ugd/b0c717_2e1c36d490124e12a80b74dfb74c5086.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/javag.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/budget_constraint.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/75679025574.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8946/files/harry_potter_book.pdf
    • https://cdn.shopify.com/s/files/1/0464/8327/5928/files/azad_kashmir_map.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_off00006adf.bin
e44bc44aa7f4fad72c36197c0557e9134d832af52dce7676b77dd6f40d126633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADF 5160 bytes
font_01_sfnt_off00007c4e.bin
4347ecb5983fe77627f1ef779d8fdd53c6dbda2d15f5208d78b21e28496faeae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 10804 bytes

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