Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b0c9da54dd86cc…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 18:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a68a0efcf115d6ba1ec64ba4cec9dd SHA-1: b4d1ccaa1f716b03f7f8c2fbe3f42c8018fe07a5 SHA-256: d0b0c9da54dd86cc9c9028e5a449846ce1f0904dc244cbf6ccdce018e7f62348
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Baldur's Gate dual class' and the URL itself uses this as a keyword, suggesting a lure to attract users. The primary malicious IOC is the redirector URL, which is likely the first step in a multi-stage attack.

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=baldur%2527s+gate+dual+class
    • https://static.usrfiles.com/ugd/08fe48_0985756174a0493ead65262211e8fc21.pdf
    • https://static.usrfiles.com/ugd/b8c837_aac5e23d58ae4d2b8f7d988aa512a163.pdf
    • https://static.usrfiles.com/ugd/cc089a_6b8e324498344800b5804d4de70078e4.pdf
    • https://static.usrfiles.com/ugd/cc03df_93193398b22b420babbad1c19ea9ffc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.pdf
    • https://static.usrfiles.com/ugd/b8c837_c24447d30b8c47828084a64ed750a70b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/70560764945.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/8161801142.pdf
    • https://static.usrfiles.com/ugd/d54300_628c160cce514cd59afac8e45c72a0c7.pdf
    • https://static.usrfiles.com/ugd/74a852_9a40f62535ca42d8b3884d7e020fc088.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_off00007ad0.bin
bdce41c36d254512f1b04a8bee1d8c2ae6c98d67adcbdc6eaba7bc62e0c569e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 5192 bytes
font_01_sfnt_off00008c7d.bin
dc573d53ab580097174bd46a47afc8956b94bfe8760f3fa3d1c11422746fb766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7D 10540 bytes

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