Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee3b43d6c460e07…

MALICIOUS

PDF

72.4 KB Created: 2020-07-15 20:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99bc9a1ac6e712eadd9e070a08b00de1 SHA-1: 19b78dcb50216f2527a9417b03228e55764439a2 SHA-256: eee3b43d6c460e072ee7716a3015d6078a11ba00d38425af5792ee06d1da1a0d
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large external link farm. The primary malicious URL identified is ttraff.ru, which is known to host redirectors. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous links, including the malicious one, suggests an attempt to lure users to external malicious sites.

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.ru/pify?keyword=am%25C3%25A9nagement+du+territoire+au+s%25C3%25A9n%25C3%25A9gal+pdf
    • http://files.adrianaspina.com/uploads/1/3/2/6/132682787/butawefad-tajebubux-vavomitalaloxu-wikibosu.pdf
    • http://files.aerosportoutfitter.com/uploads/1/3/0/9/130969607/nilulowenoro-turiwefef-favijatazogab-lidiw.pdf
    • http://files.workwithstandout.com/uploads/1/3/1/4/131453022/mobike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/19583827360.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/suwozulamedunixijobu.pdf
    • https://badupegenum.files.wordpress.com/2020/07/41349852306.pdf
    • https://ranasuri.files.wordpress.com/2020/07/dabozarubekezejezadopow.pdf
    • https://rudabusope.files.wordpress.com/2020/07/gabuv.pdf
    • https://kepoxokop.files.wordpress.com/2020/07/ketovufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/6114297468.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/salavovutidumipovoxulumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/vuxuvamipuravutaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8296/files/10153753556.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/tutitojulavesepuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/34736742913.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/64462661290.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_off0000d840.bin
92006391c1c67e8babe01972589b80539abad510213ccb112a3a536ef0e3da0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 5372 bytes
font_01_sfnt_off0000ea22.bin
166377966b57ab1974bd3fefefc3adf50a84b4faa5f49e35fd775468326c667a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 12436 bytes