Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd18caa9620da5ec…

MALICIOUS

PDF

34.5 KB Created: 2020-08-30 04:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f8a90d78af4f6a7acdf030d3743260 SHA-1: 5b49d7448563c8b29a53ba2d6be1b9400a095dc4 SHA-256: cd18caa9620da5ece62ea6485e41577901bd5ca5f82f0d10beeb7a163c811ee7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a list of other URLs hosted on 'static.usrfiles.com', suggesting a link farm or redirection scheme. The primary malicious URL is likely used to redirect the user to a phishing or malware distribution site.

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.com/wix?keyword=libros+de+cesar+lozano+gratis
    • https://static.usrfiles.com/ugd/3e9e83_b390682334f2479cb2ea62cfc00fa294.pdf
    • https://static.usrfiles.com/ugd/4f270c_3a3ded072538416da23ac483750b58c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9f211a98cea43578793083a7e7d4c46.pdf
    • https://static.usrfiles.com/ugd/cc089a_b373e7489e4a4b0bb361de8ed37e4f59.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/e4ff69_183fe7ae2833415ea7a79bea2eaa77c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b71340a52ce44950926d405c7b26cc05.pdf
    • https://static.usrfiles.com/ugd/b8c837_9111885aa33d4c6ead162a81e014f658.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdf838f6053b4991886d3a1a2d6d2eaf.pdf
    • https://static.usrfiles.com/ugd/2e79a6_c8959d6265c24273b1a64903b8bb4408.pdf
    • https://static.usrfiles.com/ugd/930050_e0c42fea26884d378b5678a3200c9183.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_off00004847.bin
d44e524d026d8a46fa5f2241965931fcdf2b08f36036f7c94dbb7729fc532fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4847 5236 bytes
font_01_sfnt_off00005a1f.bin
a52ee061899e0bdae05cb722d5d0555ae78f0d7ad253923953ca0f1baa48bf78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1F 10376 bytes

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