Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff043a4d1decddf…

MALICIOUS

PDF

39.6 KB Created: 2020-08-29 12:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64effdcb1db5b0fb98b4a4ade94767d3 SHA-1: 33ede1339d8213796c97c88f987a03035c07ef1c SHA-256: 8ff043a4d1decddf9c001fdb0b82cd969b06e3a28826806c71ef922bfc216501
120 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, with one heuristic identifying it as a PDF SEO link farm. Another heuristic flags a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=everything+everything+pdf, which is likely used to redirect users to malicious content. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf.

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/wix?keyword=everything+everything+pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7090/files/approaching_a_girl_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/zulewodozesenubetomos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/guzipito.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9acc0b0a0f4400c95413b4d3c671cf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0443642c601b4e79819d2d3219442d66.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/formal_letter_writing_format_cbse_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/bruhn_errata.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/dijetozadufawigawenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/fetagiwirodebovepega.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/93463880279.pdf
    • https://cdn.shopify.com/s/files/1/0464/7301/9560/files/game_god_of_war_ps2_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/dofolosojo.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_off00005efa.bin
832b47d8e515ffd857a66caae13bc1988f6a4300bc0073f0c41aae250f780997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFA 5004 bytes
font_01_sfnt_off0000700b.bin
6d0ae2f7b7a9d8b24b479f798325dc62f86ec69f20b15047ad5597f6e3fa1e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 10036 bytes

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