Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d8ef37829dda5e…

MALICIOUS

PDF

40.0 KB Created: 2020-08-10 18:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ceb7392924ed055f300c124efe261b8 SHA-1: 650b3571d28dbd2c90a8171f8f73706142326709 SHA-256: 94d8ef37829dda5ed8cd47233922766f87d12b07fa94c138f36bf8ad31427efe
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=characterization+vocabulary+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily corrupted, contains fragments of URLs and text that suggest an attempt to disguise malicious content within a PDF structure. No scripts were extracted, but the presence of a malicious redirector strongly indicates an intent to lead the user to a harmful destination.

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/pify?keyword=characterization+vocabulary+pdf
    • http://files.bigvillagelittlecity.com/uploads/1/3/2/6/132681342/gezalagirevivezusaf.pdf
    • http://files.swohioiscebs.org/uploads/1/3/1/4/131437806/dekazudumidox-kadejak.pdf
    • http://files.poetryshack.org/uploads/1/3/1/6/131606325/domibokenanomifid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/zamizuxuvifatoniz.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/71734599450.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/lobomega.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/rekefozedamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/kenavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/bilurep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/howard_schechter_mammoth.pdf
    • https://cdn.shopify.com/s/files/1/0437/4845/8647/files/cv_for_master_degree_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/classes_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/46316304311.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_off00005e93.bin
cae05b257ba36d698cd3fc57dd982fd370aab306ca82f26d440b6bb1cbf33100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 5320 bytes
font_01_sfnt_off000070b0.bin
28fb6195def76739824182c90c08962850ec86e47129c86a0b841625e9cd1950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B0 10196 bytes

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