Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e311be0c57d4e2…

MALICIOUS

PDF

109.7 KB Created: 2020-09-12 13:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79aa09efed96c087f6635cdce5aec390 SHA-1: 07943703c4da7d514c392d7c7d8251f091d5da7a SHA-256: a7e311be0c57d4e2c7c50f5d260ebe055d0a71fe67c9467d576c0fc0a5cdc095
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The embedded URL, 'https://ttraff.ru/wix?keyword=excel+vba+date+format+yyyymmdd+hhmmss', is likely intended to lure users into clicking a link that leads to malicious content. The document body, though heavily obfuscated, contains this URL, reinforcing its role as a lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

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=excel+vba+date+format+yyyymmdd+hhmmss
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/bb_classic_autoloader.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/guided_meditation_10_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/ayat_surah_ruqyah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/aspiring_guides_mountaineering_course.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/frankenstein_oxford_bookworms.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/71211841486.pdf
    • https://static.usrfiles.com/ugd/fb5067_4ab0cedd3cfe469cb54f8ce1c87d1929.pdf
    • https://static.usrfiles.com/ugd/865d50_7c5f0325325a4df180c60300d0083ea3.pdf
    • https://static.usrfiles.com/ugd/b11f6d_c066edfc16da47f089d3e002f21671b7.pdf
    • https://static.usrfiles.com/ugd/ef7486_9be01983c1064d91ba6291386873dc76.pdf
    • https://static.usrfiles.com/ugd/6812d7_24a2537a86a643fa9f6f6d536f611964.pdf
    • https://static.usrfiles.com/ugd/185811_75fdd01087a143e3add3fab3946f0efd.pdf
    • http://www.mvps.org/dmcritchie/excel/datetime.htm
    • http://www.mvps.org/dmcritchi
    • 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_off00015f74.bin
585b316c556f839bc1f506a47d6b9dd8c016fe4eab87933c45bc7d7175fe2aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F74 5588 bytes
font_01_sfnt_off0001725d.bin
6af017c2fc28b4d3f6a6cffd7b7427a9cc3d71dd239002fecc3e231a04853e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1725D 17860 bytes

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