Malicious PDF — malware analysis report

Static analysis result for SHA-256 b802f4db7701d645…

MALICIOUS

PDF

36.1 KB Created: 2020-08-28 01:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f01e67f1bb5f8a4c0a4cc2baf0f435 SHA-1: 3d66285cb17815556b5fda6fcec077595eb0b806 SHA-256: b802f4db7701d645dbc2d05782e4b2a8994964e469ca5a6fe4fceb127e5dd90c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a free manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM firings indicate that the document is designed to lead users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination.

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.cc/pify?keyword=manual+de+ingles+sin+barreras+pdf
    • http://files.queensweepers.com/uploads/1/3/0/7/130739443/6340396.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/pill_identification_wizard.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/elton_john_circle_of_life.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/deathwatch_codex_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0457/8620/2278/files/37915218423.pdf
    • https://cdn.shopify.com/s/files/1/0462/6913/7045/files/sennheiser_3d_g4me1_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/wamaxogovuwuzin.pdf
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/sql_server_2012_enterprise_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0437/5075/2417/files/89436702215.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/save_website_to_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/netbeans_8._2_plugin_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/8342/2109/files/engineering_drawing_books.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2792/files/bamakebiburo.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_off00004be9.bin
72aaa0a3966dd66c5e3a4afd78b14ad6f29c69c9ed3093d54ff11d7768e702ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE9 5352 bytes
font_01_sfnt_off00005e22.bin
21dce804e244c8cfcaa47c45a146d335b8565ddda06e529ffab84e54f757283d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 11004 bytes

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