Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06628763d0bc724…

MALICIOUS

PDF

38.7 KB Created: 2020-09-01 01:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f55f00c867c5162c47bd8025c1eebca SHA-1: 0e5977f504eb27cc03a0de7e3d5963ce66ed4e58 SHA-256: d06628763d0bc72478a0662418e0ecbc2eaa8386966375f1797b19be1f3371ec
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.com/wix?keyword=cover+letter+template+pharmacy', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to improve SEO for the malicious redirector. No scripts were extracted from this sample.

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/wix?keyword=cover+letter+template+pharmacy
    • https://static.usrfiles.com/ugd/b8c837_01c0d35c53b741568e686c0c6e08911c.pdf
    • https://static.usrfiles.com/ugd/96768c_41606da9d25546a09cc580e98d124997.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df26a97b4c64eae930d8ae76ac9163c.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/advanced_uav_aerodynamics_flight_stability_and_control.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2931eb0f4b647fc8cead60f5e2cafda.pdf
    • https://static.usrfiles.com/ugd/cd79e3_47378f75f93c448eb8c8e563ef9f9497.pdf
    • https://static.usrfiles.com/ugd/40b9e6_5b1a238fbf074fc9a0535cf86dc8fce3.pdf
    • https://static.usrfiles.com/ugd/6a22cb_c43e5f9866374f05844bdf0130de756e.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_off00005ab8.bin
95d2482015297a16883c1fb740e73eb852becf51371fdff32820af5edde664ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB8 5064 bytes
font_01_sfnt_off00006bca.bin
74ac7f953b1c369ed0d11c14bb064e881e004a02562c893f65db56000ad114d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 10192 bytes

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