Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feb3dfd42752fb9…

MALICIOUS

PDF

40.5 KB Created: 2020-09-07 05:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a88fa8858503729532688cdc48149f9 SHA-1: 5677add4a6565cb825c171925c727a22dab50d11 SHA-256: 8feb3dfd42752fb95d4feb4e9aba8e590dfdd92417f9234624d96d5a412b8937
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, which is also present in the document body. This link likely leads to a malicious site designed to trick the user. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, suggesting an attempt to manipulate search engine results or distribute content broadly. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=3+main+types+of+unconformities
    • https://static.usrfiles.com/ugd/a107db_0b215bb0fde54a1798421f4c69bdd7fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_37139062dca7476993837f8d383cc0a0.pdf
    • https://static.usrfiles.com/ugd/10b03a_fe38744d527c41fba71fe51e35c11886.pdf
    • https://static.usrfiles.com/ugd/b8c837_05b497b961194b16afdc2a94d0ec40ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cf5d56a661243fba9817a90c2b050e1.pdf
    • https://static.usrfiles.com/ugd/8b97dd_3ca43a94f7df48c1957c707f664d3bbe.pdf
    • https://static.usrfiles.com/ugd/74a852_e37179a783af425c9e2112015bc714b7.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_d235abcfd4384d6b99ef29aee3c6894b.pdf
    • https://static.usrfiles.com/ugd/b8c837_363c9ddac28941259d3caeed550b9fcf.pdf
    • https://static.usrfiles.com/ugd/7e6083_474aa596ea9d4b349ccfd8ae2bef21dc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/naruto_ultimate_ninja_heroes_1_ppsspp.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5431/files/math_worksheets_addition_and_subtraction_to_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/94406115407.pdf
    • https://cdn.shopify.com/s/files/1/0432/4314/3330/files/dafavugavoguzuvidarukipux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/61153827798.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_off000060dc.bin
47ad7dc38cb1dfa69dcc234f0825c4d06bb0bf68776c58ce70e8e9a688be21b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 5300 bytes
font_01_sfnt_off000072db.bin
e857f84054f86e2b25cd15ccc7c001cdb4e3af123fc77439a8b29cb448aaa08c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DB 10128 bytes

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