Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e558eda45ea050…

MALICIOUS

PDF

59.7 KB Created: 2020-09-01 22:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5752702afe3ee0b22db07e695a6e9010 SHA-1: f78a12797ebab408e86343e7f87caa3dc9906268 SHA-256: f9e558eda45ea0502ffda499ec2e1ce0cd1bc748996fbb2d99a5799dc2026977
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free audio songs, likely intended to trick users into clicking the malicious link. The presence of a mass external PDF link farm further supports the malicious intent of redirecting users to potentially harmful 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=janapada+geethalu+telugu+audio+songs+free
    • https://static.usrfiles.com/ugd/b8c837_78becd815b094071a59ceb8afbc0b874.pdf
    • https://static.usrfiles.com/ugd/83b1b3_5a1e5fc72422491180df9335f88c5233.pdf
    • https://static.usrfiles.com/ugd/97368a_297f37534b4a4262b12249dd5c46b546.pdf
    • https://static.usrfiles.com/ugd/45e30f_be72d5c832a149c488608dea066e7425.pdf
    • https://static.usrfiles.com/ugd/1b8612_561a1c532cf44d13a00cb77b61501fbd.pdf
    • https://static.usrfiles.com/ugd/f8de3e_2bf90e30858e45989c78dd1ba6f867de.pdf
    • https://static.usrfiles.com/ugd/61b8bf_240905ba369045949f141bf7f35460eb.pdf
    • https://static.usrfiles.com/ugd/6cfc61_f5dac9b1a29d4eadbc1b8e6cb8c34062.pdf
    • https://static.usrfiles.com/ugd/4f270c_06267c075a0c46f99f3e14e443dd5473.pdf
    • https://static.usrfiles.com/ugd/67e251_01308355f4594e8e8740c952cef44fe7.pdf
    • https://static.usrfiles.com/ugd/ce5d00_58d90c587eb24b5caf9743fe8116a831.pdf
    • https://static.usrfiles.com/ugd/defcb2_d4b22524f13542c2b0a8f4a0fcecb8f5.pdf
    • https://static.usrfiles.com/ugd/1b8612_e54fa97608ac477dac482fccb923a794.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_off0000a373.bin
e5b0cac32f9b6232e1858b83d8b3013bb49af01b3737d05b94f65d65a83c66ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA373 5292 bytes
font_01_sfnt_off0000b572.bin
c2aa994cae3efedc9c0d29ed1089266462999328ec7a5c70a9627286944bc18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB572 14380 bytes

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