Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6524472a8c5460f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-28 06:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cbbf027c582374878d3568987c76ba2 SHA-1: b1ae6a3ac09f80e8b7d3fe6a269c26be4a7d7045 SHA-256: a6524472a8c5460f945ce6980520fb7cae27d882ab0bc8e7d8a9355f57c69161
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure. No scripts were extracted, and the family is undetermined.

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=rafael+amaya+tem+filhos
    • http://files.thegreatest.ph/uploads/1/3/0/9/130969438/c49c30e.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/32969464349.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/64868228211.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/make_page_size_smaller.pdf
    • https://cdn.shopify.com/s/files/1/0462/3656/5655/files/19713577873.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/881835854.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/catena_aurea_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/mailer_template_rails.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/vedujumebutimule.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/manualidades_con_material_de_reciclaje.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/jonejutikegupimusafuxuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/93468457176.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/bapupaverivedomiwozo.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_off00006c9e.bin
053a3381cb22713c71d31cc6cba3d6810313f51460218ccca4cca852453b1831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9E 5020 bytes
font_01_sfnt_off00007da6.bin
e5e0caa11658e55d9e8c207e9ae0636f880190072ee22b905337078c0dfb26cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA6 12080 bytes

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