Malicious PDF — malware analysis report

Static analysis result for SHA-256 39da805727bac663…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 13:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf9f21a9c6121bc3eaf79eb3a8f0408 SHA-1: e01cf8d17e1c5e7bfe9f8a82b24bb499002040a2 SHA-256: 39da805727bac66371c5abad37419798c0e54d6d1020bbc7578ce6885dcad84b
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to traff.cc. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=inversion+de+giro+de+un+motor+trifas, suggesting a lure to a malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, likely for SEO poisoning or to obscure the malicious redirector.

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/wix?keyword=inversion+de+giro+de+un+motor+trifas
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/godupenavipaputuralozexaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/xokedazigumapalizab.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/45351122867.pdf
    • https://static.usrfiles.com/ugd/38eac1_ad48919470fa4c848d8758f0d93dc143.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62dca9eb4164cc580e4e8856dd25dcd.pdf
    • https://static.usrfiles.com/ugd/5e8de6_ef9d37d3197d4c269df0a1ce68109c4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b899be96b31248479493df062aafba81.pdf
    • https://static.usrfiles.com/ugd/97368a_9f0d929ce7ec4d7da44bbac08e05791a.pdf
    • https://static.usrfiles.com/ugd/dd4472_7d49a855979b4f50bd5abfd4f6862c72.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/lagu_nasional_bendera_merah_putih.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/laxotelasifedomipugifuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/upper_gastrointestinal_bleeding_surgery_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/descargar_temario_administrativo_del_estado_gratis.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_off00006252.bin
e42c32b6f812f729f43172b27f0acb328dcacdb7264c5b09e0a866003a7396a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 5192 bytes
font_01_sfnt_off000073ee.bin
e5505fead4d95cff64b274ebc62e3817f082dd18e54f377a18aa1ad7ff7ff428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 11228 bytes

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