Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f31614f17e5407…

MALICIOUS

PDF

63.4 KB Created: 2020-09-01 10:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5a5f16b17e991a6ad8cbe8a24fafce0 SHA-1: 94efa18171043fe96c543b1c2542826fab7bbb08 SHA-256: b0f31614f17e540701385db305839039bc885b452ff381e65495df843de69a33
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link and a large number of embedded links, suggesting a link farm. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document likely prompts the user to install a browser extension or update, a common social engineering tactic.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/pify?keyword=certificate+border+template+for+word
    • https://static.usrfiles.com/ugd/451461_09a24cf1ecf847e48ce1b69211d84520.pdf
    • https://static.usrfiles.com/ugd/b88e3d_4975f9560d9e44458eab301dd1109338.pdf
    • https://static.usrfiles.com/ugd/9734e7_2790a85a4762476f9c3ea48596d2cd3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bb7376ddafa4b858ccae59bcf8f2591.pdf
    • https://static.usrfiles.com/ugd/856cea_00acce09dc3c4efc9fcab88658e5516e.pdf
    • https://static.usrfiles.com/ugd/b11f6d_3e56232ad3384ba2b3bc2ad853ef25a8.pdf
    • https://static.usrfiles.com/ugd/3dd68e_68269781bf754b94907c8c46c63faf31.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/pirevagitisonazona.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/wureni.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9917/files/coloring_pages_animals.pdf
    • https://static.usrfiles.com/ugd/b8c837_73915070b751498b9cb773e521ecde22.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce1ce81e67c94c0eb1b774aeb30db866.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b17b.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB17B 2828 bytes
font_01_sfnt_off0000bb76.bin
fa8c67fe8ae3263e0eceb266e64420dcbf69752cd67f5e521a2eef093d619c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB76 5260 bytes
font_02_sfnt_off0000cd4d.bin
af9e5021baed56424fa967bc5f51da79467c6a3378cdb4fc76bad09bcf9f5b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4D 10096 bytes

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