Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb33c2b25f3051f6…

MALICIOUS

PDF

32.0 KB Created: 2020-08-30 22:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8126569507bd8932f352cc35540fc669 SHA-1: 1e43dfc00eee027736bd5500699d3427b3cf8795 SHA-256: bb33c2b25f3051f633e0227dd20b600fcad3a03c2645fb7b83b4de1b2ac783ca
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=the+purpose+driven+life+free+download'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading content. The file also exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent of redirecting users to external sites. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence.

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=the+purpose+driven+life+free+download
    • https://cdn.shopify.com/s/files/1/0449/7191/7471/files/lewovonefugoleda.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/bejosetanupir.pdf
    • https://cdn.shopify.com/s/files/1/0461/6676/9827/files/air_new_zealand_flight_attendant_application_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba81411a5788433eb5a317c500da141c.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/degradacin_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/bluestacks_offline_setup_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/9750/9278/files/agricultural_economics_and_agribusiness_8th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/reading_comprehension_for_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/84569282745.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/71165856136.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_off00003fa6.bin
21dc17bf9bdaf996f3660c89975b7687a2d801ba289d5f46d35d7e57ef69dccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA6 5232 bytes
font_01_sfnt_off0000517d.bin
1e19466e8d6a4a19359502888c4305773df59c4bea2aefb2c309fd77cc86a081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x517D 10108 bytes

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