Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f66975f56eae30f…

MALICIOUS

PDF

49.0 KB Created: 2020-09-13 17:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0053f85ce2d4074f83df9755ddc5be72 SHA-1: b462f739c4ca66fcefec36c9f6111d0c8bd25f3c SHA-256: 2f66975f56eae30f6d8542f1b21a6ffa25d11d10bdf2b9b1fc3474faa5ae63cf
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'ttraff.com', which is known for malicious redirection. The document body, though heavily obfuscated, contains this URL and references to 'gunvault nv300 manual', suggesting a lure to trick users into clicking the malicious links.

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/wix?keyword=gunvault+nv300+manual
    • https://static.usrfiles.com/ugd/22bf55_aedb03d797be4673a5ee616100d7cffd.pdf
    • https://static.usrfiles.com/ugd/a4e402_5d6d0871516b46a9bba26330756bfb5d.pdf
    • https://static.usrfiles.com/ugd/bcfc12_4158fd941f0c48b28e661b6b7cbf7abe.pdf
    • https://static.usrfiles.com/ugd/99afdc_ee3836d24b2d4ae6836d6a03d50b088b.pdf
    • https://static.usrfiles.com/ugd/accd1f_1e8e87d73f8c41e8aeb491b46f1b1bea.pdf
    • https://static.usrfiles.com/ugd/11b39a_431293b5e737488aa7ec29405a3f9359.pdf
    • https://static.usrfiles.com/ugd/d017d5_0f5eb07f540c4ad7a697f46d33bfc7e4.pdf
    • https://static.usrfiles.com/ugd/0f5b72_840fc1557237463f914edb890e483bd1.pdf
    • https://static.usrfiles.com/ugd/81d6a4_2fb94d5555ad4f43b0f57ca4ef62e565.pdf
    • https://static.usrfiles.com/ugd/d99ef3_d170ded238e64423a118cf3bdd1f6dc5.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/28658801278.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/shoulder_impingement_syndrome_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/rizegonemofasabolulomada.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/samsung_tablet_parts.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_off00008300.bin
b47109a47b0a75a91cff103aa53f783fd21c70b43a67bbeeda12670b693dd3e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 4956 bytes
font_01_sfnt_off000093d4.bin
cd6ef40a9d281c78bc2443e53af57180a6442a71d34178d9e1cbdc86e4462835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 10292 bytes

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