Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf790e260856a53…

MALICIOUS

PDF

52.2 KB Created: 2020-08-25 03:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea3b3c655f290ff01dfa2f5ab90eac8 SHA-1: c939fbb4ad7915964ac9dde465b520131edda2a5 SHA-256: ecf790e260856a53c172645fa86f44e6fb84c2930c541ad4ff9c032c48582b49
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=intracranial+meningioma+case+reports`. This suggests the document is part of a phishing or spam campaign aiming to redirect users to 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=intracranial+meningioma+case+reports
    • http://files.mgh-r.ch/uploads/1/3/2/6/132681342/5466685.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/78586202529.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/motorcycle_voltage_regulator_rectifier.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/zedafuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9591/files/62911896858.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/tefupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/44429154003.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/gorazolavodafusaruwoges.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/tudagufazufebimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/table_top_calendar_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9447/files/puregesaluvovedoferebaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/o_gestor_eficaz_peter_drucker.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/fifipalitizagej.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/80665300709.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/muxabawikejadafimifudu.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_off0000897d.bin
fd37fcc967d7e9777b1dd8fb2d1b40cf431262ef68d291f82559da0075d07935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897D 5192 bytes
font_01_sfnt_off00009b00.bin
38bf1868d49ed44f71c318fa1ff82b27096507bb57b36bc81600f08e5c91138e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B00 12660 bytes

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