Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb35ada24437b0c0…

MALICIOUS

PDF

40.1 KB Created: 2020-09-01 00:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9adc427315d4d42761b758b1f030a4ec SHA-1: b65910bcb9aaf3fcc9030e04a0a225a7dd438de6 SHA-256: cb35ada24437b0c0ef8d3fd4fce328dbae8a4ce613e654cd68441102e74a8dd9
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with a significant portion pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Android versions 6.0' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a PDF malicious redirector link and the ML classification strongly indicate malicious intent.

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=android+versions+6.+0
    • https://static.usrfiles.com/ugd/b8c837_3c9ac6d87a2b44e1a8b8648094a9387c.pdf
    • https://static.usrfiles.com/ugd/2ca09c_7573052ff6fe4868a415e17930026b39.pdf
    • https://static.usrfiles.com/ugd/b7ab08_4bcbdaf4867340d18f55b2299dfa69a9.pdf
    • https://static.usrfiles.com/ugd/3826db_712ab4a7550643c295d448e079fca756.pdf
    • https://static.usrfiles.com/ugd/b8c837_180bab1df0fc4d8e9ea8f9ab08d461e7.pdf
    • https://static.usrfiles.com/ugd/f1d680_b7c8957715a34a98ab508b3d041afa0c.pdf
    • https://static.usrfiles.com/ugd/de60da_4ff1f909434146109338443df9e6623e.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/atmospheric_aerosols.pdf
    • https://cdn.shopify.com/s/files/1/0440/2960/8101/files/jijazofinujulijonexusawe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/sosorolezumivadupijik.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/lonumajos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/86218206446.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_off000060dd.bin
6c1cc862595d29390d0dd1e7f2ec1d9003ad337f414830fc54ecf3a41f3df3d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 4952 bytes
font_01_sfnt_off000071d8.bin
26716f06253397aa4201f132d915747a3fb7027f2e8a6e515c34141df58c2ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 10024 bytes

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