Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bd450336f7f69e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-27 20:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d24bf3b5a8b7f6a26b6a1a9ea851f79 SHA-1: 2553d3b7fb177b358da834bc19ca783b202aa849 SHA-256: 20bd450336f7f69e6210439e4766edeb62ca573a7e097a9150dd412db87f40e3
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'aromatic and antiaromatic and nonaromatic pdf' and references 'wkhtmltopdf', suggesting a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aromatic+and+antiaromatic+and+nonaromatic+pdf, which is flagged as a malicious redirector. Another embedded URL, https://cdn.shopify.com/s/files/1/0435/8494/6333/files/54033700818.pdf, is part of a link farm.

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.cc/pify?keyword=aromatic+and+antiaromatic+and+nonaromatic+pdf
    • http://files.kimberlydeanne.com/uploads/1/3/0/7/130738603/nojaxilidizup.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/54033700818.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/tinasateduwamezogejen.pdf
    • https://cdn.shopify.com/s/files/1/0435/9258/1288/files/zanulazuwudisopiromodofi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/android_tv_browser_full_screen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/zip_codes_murfreesboro_tn.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/adb_driver_samsung_s4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.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/
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/android_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000885e.bin
01f0fd3d69b441bb651c5adbca09943a4ff9a3561e8679f6a51c999f8956a404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 5080 bytes
font_01_sfnt_off00009981.bin
676c4c70d994d5cc5e5ec783d47a1ef374aeeb9c05705f6414d62ac2a7dca1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9981 14160 bytes

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