Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f939b8e910f8bc6…

MALICIOUS

PDF

57.7 KB Created: 2020-08-12 22:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9031b1cc1adf9163c4d24af4016fd1b4 SHA-1: a445a194a12c6b4ad00d58c99f1ba75e140c0e79 SHA-256: 9f939b8e910f8bc613f31d458f2a22e6a6cd2cb32b0456921c94782ba9312cc5
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This indicates a link farm strategy designed to lure users to malicious content. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content for malicious purposes.

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/pify?keyword=examen+de+las+28+creencias+adventistas+pdf
    • http://files.ayrtherapyandconsultancy.com/uploads/1/3/1/0/131070152/9887914.pdf
    • http://fukufen.melissaavitale.com/uploads/1/3/1/4/131437535/0bac30e3d.pdf
    • http://files.shsbballtipoffclub.org/uploads/1/3/2/6/132695633/5031965.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19836568605.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/kuvizuzugazuxibatawagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/abelian_group_solved_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/acta_constitutiva_de_una_empresa_real.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/kexesamerosewusipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/watogipub.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/wulejiduwokoligodofaxej.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/disezusofebipe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/92107667347.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/wupilovodefuxika.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/vozubowe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/abuelita_de_batman_guion.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_off0000a173.bin
0135a96e4eb182384ea8d4f7344229ec9018717601dc779ec1d3e27e6eeeb2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA173 5712 bytes
font_01_sfnt_off0000b4da.bin
866fd8f3aa3aae7e676f1d29f03dad301d26cf56ef5bec22528edc648e0be04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DA 10744 bytes

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