Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafdc81e32a93dc1…

MALICIOUS

PDF

35.3 KB Created: 2020-08-20 04:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b362c0f06b00dc39724110f9aaf11e7 SHA-1: c04900a18e17224936c36c16b33ee03bc6a03e66 SHA-256: eafdc81e32a93dc196b1d3862e792ab1bd3c65324a0e4ee8f3596db39004e259
120 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=philips+respironics+bipap+s%252F+t+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Philips respironics bipap s/t manual' and references the wkhtmltopdf tool, suggesting a lure to disguise malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for 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.cc/pify?keyword=philips+respironics+bipap+s%252F+t+manual
    • http://taras.wctherapygroup.com/uploads/1/3/2/6/132696056/tijozotolamawot-raniveruv-rupefewi.pdf
    • http://katid.letthemlearnllc.com/uploads/1/3/0/9/130969723/retava_pefiv_daroropami.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/77848899628.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/medical_work_experience_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/facial_vascular_malformation_icd_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/under_maintenance_page.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/proyecto_de_investigacion_sobre_el_bullying_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/catalogue_schneider_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/tb12_nutrition_manual.pdf
    • https://cdn.shopify.com/s/files/1/0454/7330/0632/files/joint_probability_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/82517052623.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_off00004ced.bin
30adeb2c79c2c8c52c41fcd288007ac15b991e7f8b272f903a82b8f9dbab9cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CED 5352 bytes
font_01_sfnt_off00005ee6.bin
6df1e928ab3b5d602584539bb5b4ccb6b20753bae597716ec00a485226584d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 9888 bytes

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