Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ec21ecc8abd529…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 12:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1924c86b1614d2edb470b812de22abc SHA-1: a641da8d19305efb081bc1b40a7b2a84c40e6355 SHA-256: 45ec21ecc8abd52922690c1615fe8e16fa5e0e020f308e8f8b307f5fd61abdc1
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=1%253A+30+minute+timer'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links, flagged as a link farm, further supports a malicious distribution or SEO poisoning tactic.

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.ru/wix?keyword=1%253A+30+minute+timer
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/vugidejepogilorij.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/rubitalopebajitamaviwar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/venomous_fishes_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/15123060182.pdf
    • https://static.usrfiles.com/ugd/22739b_37ca484edb354a279980386a319c148e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0059d019dd9447f2a0ece78b553d13f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b55c0ccdbc1f4eb6914d3a62434ae03b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bff50e9c78c483594f051e38d170046.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7381071972346f296888b70f5ad0415.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7deda28ff6422481ffdd6e65b38894.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9acda9ffa934ff98a9452f81e46c4aa.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_off000055f7.bin
e95aa5f807db1df4b69bbcd259871b251c9dccb56e54aeeb61c0a27eb8bc4ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 4496 bytes
font_01_sfnt_off0000651c.bin
f67149e5f9d143e1a3128fd42e9beb3c25006c18bef487f777444b6251cf86c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 11224 bytes
font_02_sfnt_off00008a35.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 4324 bytes

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