Malicious PDF — malware analysis report

Static analysis result for SHA-256 e930a4bca06bfa02…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 13:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cba4c7b0230f87d96a3337d58966347 SHA-1: 8652a5ac327fd3b02d278febd428f621a9fa0ec9 SHA-256: e930a4bca06bfa02ca2b318b1fbaafbb839f86192ec4a97f7459db94bd1d6129
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially garbled, contains text related to learning to draw and mentions the wkhtmltopdf tool, suggesting a lure. The primary malicious URL is https://ttraff.ru/pify?keyword=curso+para+aprender+a+dibujar+pdf, which is likely used to redirect the user to further malicious content.

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=curso+para+aprender+a+dibujar+pdf
    • http://files.kerricoledesign.com/uploads/1/3/1/4/131437941/461158.pdf
    • http://files.rosebudbirthingservices.com/uploads/1/3/1/4/131437380/7080079.pdf
    • http://files.collincurry.com/uploads/1/3/0/7/130739991/81fbe7bf93.pdf
    • http://files.dealswithdessy.com/uploads/1/3/0/8/130813357/tujunibapesedakede.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/24726832002.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/46648908011.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/45818413267.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/merom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/dumulelenerabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/88165480945.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/separation_agreement_ma.pdf
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/bukij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/mijasopatulaleron.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/gujosexolijujexakedinano.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/89278576820.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006072.bin
9468ff07fdcf3786b05320facb718609ad0c05d2dfb77e90aa9e67226933e7a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 5124 bytes
font_01_sfnt_off000071e0.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 2092 bytes
font_02_sfnt_off00007b86.bin
a41535acfbd81292a58fd26e0f385f6f4720805ac8f1a50656db397caf9937b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B86 11072 bytes
font_03_sfnt_off00009fb5.bin
91c30074f85501cb5fe9baf33f35f843940bfa30be12b849312283e920dd8f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB5 16488 bytes

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