Malicious PDF — malware analysis report

Static analysis result for SHA-256 b518e045ad59a6c0…

MALICIOUS

PDF

34.5 KB Created: 2020-08-30 09:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa67623068373408828469a72841869 SHA-1: 1d961d0e98cf704825110cb46ab0b73885a3c545 SHA-256: b518e045ad59a6c0dc9a5c2805f0d85b0da4bc52724496f775a68d258a994dd4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=introduccion+a+los+procesos+de+manufactura+mikell+groover+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with 12 external PDF links, suggesting a tactic to distribute or mask malicious content. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, reinforcing the lure. 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.cc/wix?keyword=introduccion+a+los+procesos+de+manufactura+mikell+groover+pdf
    • https://static.usrfiles.com/ugd/2c8d66_b775ec9d8abc48d795bbf49e8b55cb57.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
    • https://static.usrfiles.com/ugd/34ec99_76ab5519be5d4944aa08916194681f12.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccb8a125ba5a459f8f601b6bfbbbc0f4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2197/5197/files/after_book_2_wordpress.pdf
    • https://static.usrfiles.com/ugd/3eed2b_c3738e24ac964bad8430a5afc28b9de3.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_8e6de6ab46bc477b83e19faf074d0aee.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/27317640810.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/sufomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/lizosez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/angular_4_custom_validator_form_group.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/6707536609.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_off000045bf.bin
e359464934a950d5628d2117acc039f1872c836b3a85a718a95c2a1fc3eb823b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45BF 5536 bytes
font_01_sfnt_off00005884.bin
c68730f3fba9caf792bd254d6098dd5876130bb3d95f8d57d5ba17a9ede74a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5884 10556 bytes

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