Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8dad9cf4498085…

MALICIOUS

PDF

34.7 KB Created: 2020-09-02 05:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 430f50817597f44c391d6eaa51e05ddd SHA-1: 016065d6ef4689f70e5090cf26ee8ca211badab3 SHA-256: aa8dad9cf4498085a5ee560ba3f5de78065e165a8852c19b6ac3ebca95232a13
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as a "Bcbs medicare advantage provider manual" to entice clicks. One of the primary links, https://ttraff.ru/wix?keyword=bcbs+medicare+advantage+provider+manual, is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or redirection attempt to malicious infrastructure.

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=bcbs+medicare+advantage+provider+manual
    • https://static.usrfiles.com/ugd/97493d_9f47d2b11e0b451bafb56414736e7498.pdf
    • https://static.usrfiles.com/ugd/18574e_e22b8a4ebf0f4db3937f5324bd3abb1a.pdf
    • https://static.usrfiles.com/ugd/432b07_2ed502b36ed74a8d9f867d09a5f1e3f3.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/73324932600.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/15217908319.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/29736325286.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/boundary_conditions_for_magnetic_field.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/mama_ntilie.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/couper_en_2_pages.pdf
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/canavalia_ensiformis_usos.pdf
    • https://static.usrfiles.com/ugd/80bfa9_94513a5865d749848afdff6bd69834cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdf5f146ca094003854c4e8304bba7de.pdf
    • https://static.usrfiles.com/ugd/d94ae5_f0bdcdb2eed04f6c8d77dfe426c991a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_55dcb8d9da9740ba95e7494f69c9a316.pdf
    • https://static.usrfiles.com/ugd/856cea_d900da73c2354d24834b19ffe34a1861.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_off000048eb.bin
a2dde354c2f434500181cb1a9948496805cea4f392f8ad91073c18a08c8c9e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5640 bytes
font_01_sfnt_off00005c03.bin
4c633fe9f26f2ac3af45f6518284dde50e508bfb1b66659dc387ac92b57a2b9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C03 9752 bytes

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