Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fd7dd2078fda99…

MALICIOUS

PDF

44.4 KB Created: 2020-08-29 23:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c7f91aeabed062bc0a4d0bbfecc836 SHA-1: 083d5d23fe82a63af9a63c2ea7c5709d665a3ecc SHA-256: 39fd7dd2078fda99c0b945bc2bf11a06accfdbe89d81596cccd2cc0ffb38f0ff
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download button, aiming to trick users into clicking it. This link, 'https://ttraff.cc/wix?keyword=solidworks+2014+free+download+with+c', leads to known malicious redirector infrastructure. The document also hosts a large number of external PDF links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for the malicious lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=solidworks+2014+free+download+with+c
    • https://static.usrfiles.com/ugd/b8c837_7d6d61c0dedc41bf9f1d42eb19c0eb5a.pdf
    • https://static.usrfiles.com/ugd/429b25_e038a1ec9f2149e7a1612a50bd2c61bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_94873d6420b6408291bef7a9084a226b.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_0158d9ebf8114d478c5ef367785fb31f.pdf
    • https://static.usrfiles.com/ugd/834936_13be9f2a332d4c2ea73359b0cf67f71f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c3eec5cda04c8e9819206fed996b30.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf171a5ef2d744f5b6df74b9ed201237.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_34e09ecf3de4427f8a6fa9a4e843c08c.pdf
    • https://static.usrfiles.com/ugd/b8c837_375a05807ce04b289c25bb17c0fdcfbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_255a84215a284ca88d45dcb08a210a2e.pdf
    • https://static.usrfiles.com/ugd/e3ff21_431cfc9258c84bf194cd632ab9959c7e.pdf
    • https://static.usrfiles.com/ugd/1a89c8_0b820c030f294d6c8cbc4ab8786d956a.pdf
    • https://static.usrfiles.com/ugd/79e0dc_38341594a0bb474caf3cd947f7e15b58.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c16c48e193c450a899b13d3661be91d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fb2f9cbee6942548e2d36f1f208073c.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_off00005ff3.bin
fbf750e12db7acf886436a3be263cefbaff646cf24c6c85694262c12f6b0f1e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 5572 bytes
font_01_sfnt_off000072ec.bin
5fc68a20dd5f2b331cdef870b93674797975c7dace2ce7785cbd9b41548bbd23
pdf-font-stream PDF embedded font (sfnt) at offset 0x72EC 10500 bytes
font_02_sfnt_off000096dd.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x96DD 4324 bytes