Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb812732dbf02c61…

MALICIOUS

PDF

38.6 KB Created: 2020-09-01 00:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa5c7ca46801e1816b7413f7f609640 SHA-1: 8353d558e51726f7a6e16f3bb4c83601bc3cb2ef SHA-256: fb812732dbf02c61ac5e5e95e3b7cad154fff9d41e51d2d032ecb75e4317a361
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 one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links. This suggests a link farm or phishing lure designed to redirect users to 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.ru/wix?keyword=fftoday+roster+sheet
    • https://static.usrfiles.com/ugd/8ab72e_5a631c17e1614cf0826deed67bb88dee.pdf
    • https://static.usrfiles.com/ugd/4b7290_ad1c50e3e06a43f38a905f7f63f8bd8b.pdf
    • https://static.usrfiles.com/ugd/9a242c_575d6be3b924412cb36424a76eabeea0.pdf
    • https://static.usrfiles.com/ugd/b8c837_17deed89015940d9a6f183a05e92f7a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_43554f5a9baa44ce93ba3a9b8d3bfc90.pdf
    • https://static.usrfiles.com/ugd/b8c837_855710d6f7a044dc85e388ae32782f77.pdf
    • https://static.usrfiles.com/ugd/078c79_f6b46c56dd3d42c7902278d2538741f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_74942d65a4a642b8b780e8b884f61fd6.pdf
    • https://static.usrfiles.com/ugd/97368a_d0066bf81299449ea8c9499381261796.pdf
    • https://static.usrfiles.com/ugd/234f58_4a27ed0c28fa479e8a4ec3f18e6372ee.pdf
    • https://static.usrfiles.com/ugd/8d57bd_c3822540b70e4bd38186fa053f3ddfa6.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/wigunijabon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/kirezurokozojofaluk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/mendeley_tutorial.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_off00004af4.bin
c2adf30b0a519706e3f3d21f4c6fd190f71aa00d7233fd961188206a9cd6f457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF4 4652 bytes
font_01_sfnt_off00005ae1.bin
946505ff72b45604ee64503646a1cedaeb278560524fa70ca4d7fa53cc7f0bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 11060 bytes
font_02_sfnt_off00007ff7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF7 4324 bytes

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