Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5cfb6a3ad9ad4e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 04:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65621254df398fd3b9769c489f2b9b64 SHA-1: 144124da57676521c38e979db1c2917172ae180b SHA-256: cf5cfb6a3ad9ad4efe6eea48e09e625286c96fda93b0dc3b0a126ec8e2f7f9d1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Kotor 2 complete influence guide' and the malicious URL, suggesting a lure to a potentially harmful site. The heuristic firings confirm the presence of a malicious redirector link and a link farm within the PDF.

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.ru/wix?keyword=kotor+2+complete+influence+guide
    • https://static.usrfiles.com/ugd/e2f7e1_d8a819fd54dd490fbad7c0a1abd05ddd.pdf
    • https://static.usrfiles.com/ugd/6da380_044d100fcfae4668825eeda09bdb2e5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fd8ef06d5e1496ba36508712f43b540.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a30c779d64caa82f7c8d520bb5d73.pdf
    • https://static.usrfiles.com/ugd/b8c837_66c63703024c45c3942bc6ac7713b1aa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/83804166140.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/aphasia_treatment_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed4e5c9e25a441da7a1e67086ae9b1a.pdf
    • https://static.usrfiles.com/ugd/e02969_878d8d0139f44fbf9f0ddf3521f3eb5e.pdf
    • https://static.usrfiles.com/ugd/7e6083_a0e2f28a2dbf4ca397c549e26d7d45c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d0e11fb6cf43d29792f026b4d63c22.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/derovepasikedejugoxamoniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/6140958903.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/the_complete_penny_stock_course_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/16771887446.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/jafidowozorukizoj.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_off00006a2f.bin
7bdd29b35c61aaec3caf5a7be7144880f471c283bb82aab8d3987c87e4510de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 5188 bytes
font_01_sfnt_off00007bc8.bin
1a87fd3be27bf4f3cbe33e3a22f21a4d3ba63823debbcf7ad4a52fb1da83b113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC8 12596 bytes

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