Malicious PDF — malware analysis report

Static analysis result for SHA-256 5951a1c1aca357ac…

MALICIOUS

PDF

35.3 KB Created: 2020-08-15 16:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 747ba2a8149d897f2a8c1a5ddd39ea36 SHA-1: 835363cc6b63f1e827c443886ff4045c0bd1d5f1 SHA-256: 5951a1c1aca357acfecffadeda0886f8e89ea548a075672b050fc26dabd2f1bb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=maryland+magisterial+docket+sheets'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0428/0749/2775/files/gonaxorob.pdf' being the first identified. The document body, though heavily obfuscated, contains text related to 'Maryland magisterial docket sheets' and the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted, limiting further analysis of the payload.

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=maryland+magisterial+docket+sheets
    • http://files.airsampler.net/uploads/1/3/0/9/130969390/nuxexezek_tamirezel_bobuxigiso.pdf
    • http://files.francoisdesign.com/uploads/1/3/1/6/131606674/1b188ce7defe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/gonaxorob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/gakejuxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/tofuvizepidatogifami.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/3862099753.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5653/files/bobcat_snow_plows.pdf
    • https://cdn.shopify.com/s/files/1/0438/0885/0081/files/definition_of_bureaucracy.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/nufukivoxerurijejixal.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/50748991978.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/64027601323.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/blitzkrieg_bop_meaning.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_off00004bd6.bin
660b62652f0c4a3d6bc146f4034b9ed7a3db7dda2d2b46bb837f3c16d1cbc319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD6 5524 bytes
font_01_sfnt_off00005e79.bin
4141528c31746d21fc275e2e9437cf706775b33828dd461d3c021c3cc23f9463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 10060 bytes

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