Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc6d6673e84aa3b…

MALICIOUS

PDF

34.3 KB Created: 2020-08-31 09:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c44692834b5adfb24aa516079060d8 SHA-1: f00e2184b2f28c3412a9155d6b558ddc6f534e80 SHA-256: 4dc6d6673e84aa3b4062bc673a2f0c6169216bd1c45848522c1266528d2683bd
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to academic citation. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, suggesting a broad phishing or malware distribution campaign. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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.com/wix?keyword=visual+pleasure+and+narrative+cinema+mla+citation
    • https://static.usrfiles.com/ugd/0c4177_c727aa71389049b284659f7f520b08a7.pdf
    • https://static.usrfiles.com/ugd/912de2_5c906d2ea43d462ea812dcf9c1955550.pdf
    • https://static.usrfiles.com/ugd/8e1900_9c5a2bfb09404b36bd6f2320a95af8fc.pdf
    • https://static.usrfiles.com/ugd/1b8612_51d1c6535e2b40b8b29fd8115e4dbc2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_22753cedaa424edbbe5fa513a506f6e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc81f0787e741a5a383d8d43e162c4c.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/achaemenid_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/11084858272.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/vejutikegavip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/zutupevaporizal.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/statistical_quality_control_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/7175073941.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_off000047d2.bin
b77a333a776fc7e2adb3dde3ab74efbf0e8e1f7681d261b036b077989aae3672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D2 5244 bytes
font_01_sfnt_off0000598e.bin
2b92da5b7a3c176f13db11868a207dc4b269df834a336ba02ccf1cc584324a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598E 10416 bytes

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