Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c04ff390aad218…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 05:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d161cd29f65a239f2e186816653110 SHA-1: 4209df8d9838a4656371b1e5faafbbc7ccb068cd SHA-256: 90c04ff390aad2187334f8b480b6341abc9ea2fa1931aec085db5096d947fe25
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One prominent link, 'https://ttraff.cc/pify?keyword=cup+holders+for+manual+wheelchairs', points to a known malicious redirector. The document body, though partially obfuscated, also contains this URL and other PDF links, suggesting a lure to external malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=cup+holders+for+manual+wheelchairs
    • http://bagepas.kavachikavachi.com/uploads/1/3/1/0/131071164/2355265.pdf
    • http://files.steinhausbernese.com/uploads/1/3/1/8/131856071/143350.pdf
    • http://files.mayfieldwomensclubofwc.org/uploads/1/3/1/0/131070625/kidatixuganegopugeko.pdf
    • http://refuzixu.thesciencelady.co.uk/uploads/1/3/1/6/131606490/9564159.pdf
    • http://files.medicinalrootsmagazine.com/uploads/1/3/2/6/132695339/726c76.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/mawaluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/79765962225.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/tipos_de_antimicoticos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/54967640755.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/nokapedumunivigoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/square_d_heater_charts.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/anualidades_diferidas.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/nedube.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_off000052ec.bin
f7b83f4e79277cc99c4012887ef19ce2e44d5af6391b7d287b693b6d775f56e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52EC 5392 bytes
font_01_sfnt_off00006531.bin
2aeb90339a99d5b442c601872063008aafb0dc44eb44fd99214aba1e8b737d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 13668 bytes

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