Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f821274a0d7cc98…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 17:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94609735277eb2aedee48ab5d6c0b5a6 SHA-1: 6e5217037c8474107dc9dbbd68ba51bd014970cb SHA-256: 2f821274a0d7cc9826f6670a6b6e0a30338add83340a531459d1580077a6b026
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=formula+de+monoxido+de+carbono', which is likely intended to lead the user to a malicious site. Additionally, the PDF contains a link farm, with multiple links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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=formula+de+monoxido+de+carbono
    • https://static.usrfiles.com/ugd/b8c837_e2cd573a1f6f47bb9cf2796b46061e86.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd4141fcf85948148f7b269342f39ab0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5abee67d93264a0a8fa8ec8f88a3df11.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/dpe_guidelines_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/1887304799.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a4ea3ff8a14ee09f582ce94b139d16.pdf
    • https://static.usrfiles.com/ugd/e8506d_1b5479f132f0414c911ac0d05c1575fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f21874f4e02c488e9fd7f7abb3329ddd.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/didegesubusavofejaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/limugalorelejikibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/gazatavumodotu.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/
    • https://static.usrfiles.com/ugd/e8506d_1b5479f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e75.bin
bc966af06e754e01d0f9a170d9cafa96d980f85504276ca9e957aca98ecea805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5072 bytes
font_01_sfnt_off00006f98.bin
cebb10d28cf53374ecd60a16522bcb31f00cf98408c45726798dc0093cf155e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F98 13656 bytes

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