Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb60ba5bee76396b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-03 03:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dac386bf81012904cc63141926b584c SHA-1: bb7dc09a9fcb8790921f89df22850c653f971804 SHA-256: cb60ba5bee76396b81504fdcdb5c7a217cccedc45098bad9d0923392f164f020
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on various domains, suggesting a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=vertical+center+css', which is flagged as malicious. This indicates a likely attempt to lure users to malicious infrastructure.

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=vertical+center+css
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.nancyloewen.net/uploads/1/3/1/4/131438234/5997488.pdf
    • http://files.bauerfamilygoldens.com/uploads/1/3/1/3/131379060/zapiri.pdf
    • http://files.nohokaiproductions.com/uploads/1/3/2/3/132303378/xedakaso-setogatus-muzivome.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/dujutujeduregejoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/2011_volkswagen_cc_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/lagebedusajujuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/dukolak.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/damifafoka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/86892481479.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/bukizok.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1943/files/color_code_for_white.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5271/files/kijag.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_off00005dd6.bin
1732d431083d0a2e6a2e307ba241a82aa3a5c5206763a78d71a8df8334cbade8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 4756 bytes
font_01_sfnt_off00006e0f.bin
d8ec3feeb7c277c8181bd9bc28bc94daba1b9fa08c749dff7ae67d6dff03505a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 10692 bytes

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