Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dc311a8ede01a5…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 15:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88f8815c5f648406b891865b037020a3 SHA-1: eb797a5dcccfffbebe48b4b895f222466bff086a SHA-256: 27dc311a8ede01a5fa474f0387548fcbf43cc4a3a358df22857e3a505fcb0966
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links, 'https://ttraff.ru/wix?keyword=dropkick+murphys+rose+tattoo+mp3+fre', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to potentially malicious content disguised as legitimate files.

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=dropkick+murphys+rose+tattoo+mp3+fre
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/cowboy_havamal.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/gudirinajofoturu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/metirelasosuxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/25687867152.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1250/files/katyusha_sheet_music.pdf
    • https://static.usrfiles.com/ugd/b8c837_a47a680e4ec94322a405f54667ff81ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ea13ff4a36f4b418ba880ebb8a26051.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9a5f1c605a6426e87f9e7d95393b706.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb72544a6fca4dfd9e1464d0e953b84e.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/can_can_meniu.pdf
    • https://cdn.shopify.com/s/files/1/0458/1182/6854/files/antivirus_for_android_apk_full_version.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_off00005182.bin
7a94d4154d671f48cf0de65242bc0b42c5a060758c6b5ce9a102b8a7e1dce7a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5182 5552 bytes
font_01_sfnt_off00006455.bin
0e26a71bac6c54249287a1b4cac575c1afdd2e21b1e1b754851dbcc1955481a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 14244 bytes

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