Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0f65f973fa6f8f…

MALICIOUS

PDF

50.6 KB Created: 2020-08-08 14:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be2583e5a731923b1f32a10d6c5b732 SHA-1: f064969cca17b30c822e46b932f258b097648a26 SHA-256: 8f0f65f973fa6f8f8436dfd69b0ac96bf0f0e89aa16adc7a8b50c1595d89d918
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'sql database manual pdf' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of a malicious redirector link indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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=sql+database+manual+pdf
    • http://files.bradyscustomwoodcraft.com/uploads/1/3/1/3/131383483/4577c898481c.pdf
    • http://files.catonsvilleptsa.org/uploads/1/3/1/4/131453950/1208891.pdf
    • http://files.pitttheater.com/uploads/1/3/1/3/131383541/9297828.pdf
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/wapuvepikobamimuliwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/que_es_un_brief_publicitario.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0407/files/vujebezise.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/vidamedukibugalexekon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/27537441421.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/17663580931.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/72770789298.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/41555041212.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/tinker_s_construct_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/34550942234.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/honda_shadow_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/fobag.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_off00008370.bin
3c5cf092eb527baa601750a580d5141cfb3a634e792857cfe1da4482789d38d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8370 5460 bytes
font_01_sfnt_off000095ea.bin
d1daa9ad1bf1034b9ec8eef9a91a40878b24c3a3fc65715dd51f498c729e6156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95EA 11952 bytes

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