Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc90e5b31bcd5df1…

MALICIOUS

PDF

63.3 KB Created: 2020-08-29 18:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0663ef029adef528b4f63d18160a8d0 SHA-1: 47f1a3efeafce8e610564316e137fc72e1c525ad SHA-256: fc90e5b31bcd5df15acd5764b5a41fd6dfb00ddd5b36e6d20f2743452030a84c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This URL, 'https://ttraff.link/wix?keyword=monologos+de+com%25C3%25A9dia+curtos', is likely intended to redirect the user to a malicious site. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF documents, suggesting a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=monologos+de+com%25C3%25A9dia+curtos
    • https://static.usrfiles.com/ugd/b8c837_bc4811e10edb45acbd096aa9428404c1.pdf
    • https://static.usrfiles.com/ugd/353d00_f4c6c724b44f40b496c1f83a043ebaca.pdf
    • https://static.usrfiles.com/ugd/97aff7_2d788e3fb0594b40ba86aca72e6a27d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_dde757a805c5400a8fddeb3710c5bad5.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/cayman_islands_immigration_naturalization_forms.pdf
    • https://cdn.shopify.com/s/files/1/0429/7116/8931/files/vunovaxoluniseduwaraj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8090/7938/files/mofoxirabuw.pdf
    • https://static.usrfiles.com/ugd/b8c837_2af84211bd3b42d4a2fc601104296d2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f6b10ce3454c0db85ad522e47a3c50.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f01ff7c3d394347bf32dd19df69c6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba6ec219be654ee5ba761304c1b9ba71.pdf
    • https://static.usrfiles.com/ugd/b8c837_d37f782aa0d8453083f83d42f24afbc5.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/33540473375.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/2018_annual_franchise_tax_report_delaware_instructions.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_off0000a8eb.bin
c3171adbcd7bf29d8876d90e6290d3e39fa7c05bee93262ea81ac4fd2bab0f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EB 5288 bytes
font_01_sfnt_off0000ba87.bin
de524b75bcc96048adad91fd094c79732f908ac4b305bb0857a95f631ab25d02
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA87 12668 bytes
font_02_sfnt_off0000e089.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 4324 bytes