Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfdb63b063b1061…

MALICIOUS

PDF

38.5 KB Created: 2020-08-30 19:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8577ad1cbf63a6b4b704ba1e8f842784 SHA-1: 2fbf1ddc2aa145e805ca3f8ce8a8caabdc14b32a SHA-256: cbfdb63b063b10610b6e5e4e88e5797bc48f5899f6964e6d6bb6c380afc0b33f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body itself is heavily obfuscated but contains the same URL as the primary malicious redirector. The presence of numerous links, including the malicious one, suggests an attempt to manipulate search engine results or to lure users to malicious sites.

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=physical+examination+and+health+assessment+8th+edition+jarvis
    • https://cdn.shopify.com/s/files/1/0428/4416/0156/files/edit_text_size.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/mecanismo_de_ao_da_ceftriaxona.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/gigesijon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/chicken_invader_3.pdf
    • https://static.usrfiles.com/ugd/defdb4_e83fc185243f47e18bb0478de86ac3af.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3df1840de6e486e9f91344900fc64ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/9082/0774/files/85242653109.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/lozopubut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/44448657429.pdf
    • https://cdn.shopify.com/s/files/1/0437/8656/7841/files/97905019892.pdf
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/88738008092.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3340/files/excel_set_footer_for_all_sheets.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_off0000567f.bin
790065e2603944bde79266ff964e576db0f1ff7270698d22f5372ea2de7da41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567F 5680 bytes
font_01_sfnt_off000069b3.bin
76e937195dfc82d95d0a4655c294a828e01248c6fed578425636969425e7dcdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 10216 bytes

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