Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3e526a2207926f…

MALICIOUS

PDF

44.3 KB Created: 2020-09-02 01:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 233215fd1eed4f8a8b2886a3889eb257 SHA-1: 53d533b84904f9ac260707bdcfe60de5e88bedb4 SHA-256: 1f3e526a2207926f8a949e1425177ae3433c3c35dea418fd1bef031ee0492042
162 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs, suggesting a link farm for SEO poisoning. The presence of a 'Security software disable instruction' heuristic further indicates malicious intent. The primary attack pattern involves luring the user through a seemingly legitimate template to a malicious redirector.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=software+cost+estimation+excel+template
    • https://static.usrfiles.com/ugd/4c76bf_6d4fc5ff41b14cd2833b6bbc1899aff9.pdf
    • https://static.usrfiles.com/ugd/5ecadc_12f5d5d7603648a087d9c59572b8f0be.pdf
    • https://static.usrfiles.com/ugd/97493d_7232931e6a0d4a3e8c647fc52abadf32.pdf
    • https://cdn.shopify.com/s/files/1/0462/7103/7602/files/gopupididexebepiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3866/9976/files/vuzudosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/18860722964.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/joriwobajif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/jemaxasal.pdf
    • https://static.usrfiles.com/ugd/07625c_517d274c1df54fc491989128fd7e19f1.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_1caae7d9612a4e078604c3e1d370fb8b.pdf
    • https://static.usrfiles.com/ugd/f84671_936da20489714417821975d620537394.pdf
    • https://static.usrfiles.com/ugd/afe78f_1445bc3278ad4da0a6f95b64337e1451.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_off0000671c.bin
cced51f2457e5f65b935010687bef62898ace1243f25cbff83561661e2c89c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 5424 bytes
font_01_sfnt_off00007992.bin
4c2e9315949d7d0c45bf647c1cd7655bd5914c99150a789eea035edeb3ad5fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 13556 bytes

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