Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fb672b54da11fc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 08:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4251c6d737499fd708b25d6c2a386646 SHA-1: c9bda0d2003a6bf36b4c1485d1cb2919c42408aa SHA-256: 97fb672b54da11fc8747d1c0f9386ec1adf402399cfa8bf9a2f70df9f371bcc1
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the string 'Handwriting worksheets for kids' and the malicious URL, suggesting a lure to trick users into visiting malicious sites. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious resource.

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=handwriting+worksheets+for+kids
    • http://files.janebrockman.com/uploads/1/3/0/7/130776058/2dffc7d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/rotomewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/vitekaxufadux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/codex_adeptus_astartes_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/definition_cahier_de_charge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/canales_de_distribucion_libro.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/18663397976.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/my_autograph_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/12574939780.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_off00006a05.bin
a5e43c0bf2caa3193f58b1697a070a5b0d05b18d722f683536e2f4963b9ffe26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 5252 bytes
font_01_sfnt_off00007bf0.bin
659ddb490e49775f122b507f4629315fc2ce64ae1a3e50c758e5b161fd5addf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF0 10240 bytes

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