Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07d391c8c8f6239…

MALICIOUS

PDF

39.0 KB Created: 2020-09-15 18:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ef80563876fd5f8205227ee57e760a SHA-1: ec438f7ee52016224fc7a2a3d3f17faa2371528d SHA-256: a07d391c8c8f623949623fbcea9076b89bda939c80237419535f01cfc1dfbb45
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a malicious redirector designed to lead users to harmful content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=lyrics%20the%20veldt%20deadmau5%20chris%20james
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/attestation_contribution_formation_urssaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/72039934221.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/lagu_gratis_di_iphone_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/assumptions_of_cardinal_utility_approach.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_88a56d029522469aa999ebba00309b7e.pdf
    • https://static.usrfiles.com/ugd/29c71c_9200bf3f7d0749798220dda2f0bd1cb2.pdf
    • https://static.usrfiles.com/ugd/ec0c41_f921590b855245c79fd986461bce43de.pdf
    • https://static.usrfiles.com/ugd/81b904_0ef021be207a4e5cafe2ade1825e6801.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/pezuxexifapaladar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/84161005755.pdf
    • https://static.usrfiles.com/ugd/011e4b_09dd029fb5b041e28ad55a3f51a7b7d0.pdf
    • https://static.usrfiles.com/ugd/ab63e3_e7bd854883344adfb41c07dfb967d7db.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_off0000595b.bin
118fed0411ea2979cd4157dbb288ae3d7adc7ff57437d657bedcbe464301cc5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595B 5484 bytes
font_01_sfnt_off00006bed.bin
4c567af37bbc18fbde7f694e9cc838a5b8306d6ac2c38437154f85378ff37564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 10336 bytes

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