Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b9d533b523d110…

MALICIOUS

PDF

44.7 KB Created: 2020-08-30 03:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 112369acce663482d5a1bbba7d2f5118 SHA-1: 8388db12b154b5d932520458d56488f1ca557c8e SHA-256: 47b9d533b523d1105e97b0adf924edd78ad093e535bc133c4b41f1e523200d63
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.ru/wix?keyword=thomas+delauer+meal+plan', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a link farm or redirection strategy to 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/wix?keyword=thomas+delauer+meal+plan
    • https://static.usrfiles.com/ugd/b8c837_00746bb3e7cd49f19d7059be2d01271d.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f82a9d0e4647529f0f844c9d51567f.pdf
    • https://static.usrfiles.com/ugd/5de1df_0f345d182f1e497787768748958ae22e.pdf
    • https://static.usrfiles.com/ugd/58a813_e860374001484f67ada93eaea844dd1a.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/77257715284.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/owasso_weather_radar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.pdf
    • https://static.usrfiles.com/ugd/0df15e_2af067971ccb4a00839917506b520cd6.pdf
    • https://static.usrfiles.com/ugd/b5aed9_f0a7da17876b4f89a9fae4872aa51f86.pdf
    • https://static.usrfiles.com/ugd/b8c837_c600590d24314c688e96f21fb110b748.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe522e3589b548c8a71564471d40eba4.pdf
    • https://static.usrfiles.com/ugd/f1780b_96436e27d64b4c03aaa6de65855cb94c.pdf
    • https://static.usrfiles.com/ugd/d2751c_36b83f3426de40e3a419d21deeef5839.pdf
    • https://static.usrfiles.com/ugd/b8c837_f303b18b54a047ce8b31f22858190580.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_off0000719f.bin
c7b88ce86f202ee97963caba940745b84645fc0aa6465fdfa57ecb777da6bcc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 5148 bytes
font_01_sfnt_off000082f3.bin
fd3ca620059596c4b784abfa7c9d1f99748d890a1bdb3753a5925ac1769a6ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F3 10352 bytes