Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71c13ce9d65bfc9…

MALICIOUS

PDF

68.5 KB Created: 2020-08-26 16:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d784aa79b5628961774eae9dcd469908 SHA-1: 0ff8472019a9153214328c89c642c47e43ff755d SHA-256: d71c13ce9d65bfc9f9357edef73e03cb64f6cfa4806b717274b8f34cc4a95354
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document body, though partially obfuscated, contains the same URL and references a video game, suggesting a lure to entice clicks. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=naruto+ultimate+ninja+storm+5
    • http://files.tiffestival.com/uploads/1/3/2/6/132695519/tefugurefimorod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/vuwavovaxifukujudezuxone.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/bekesavadaxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/medical_terminology_prefixes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/30327153749.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26433336276.pdf
    • https://cdn.shopify.com/s/files/1/0436/3455/7088/files/lipoxuvowimelumusurujuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/77468791645.pdf
    • https://cdn.shopify.com/s/files/1/0461/7836/9699/files/41973651698.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/50025628772.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/7836358996.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a967.bin
8ae99611eea323429abba3744ad0964f0906cf75d6ada16ddac772f2d20d7301
pdf-font-stream PDF embedded font (sfnt) at offset 0xA967 11792 bytes
font_01_sfnt_off0000d00c.bin
dda62612744d08f6db3fe033b63202456a6e5a54f3df89ec1b6a5185e65ffd01
pdf-font-stream PDF embedded font (sfnt) at offset 0xD00C 5000 bytes
font_02_sfnt_off0000e100.bin
f5a1c3b9713cef5de8111e8eb0904e155e47510299d9a496fe759b42b394e0f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 10480 bytes