Malicious PDF — malware analysis report

Static analysis result for SHA-256 25537e38fd9d5709…

MALICIOUS

PDF

45.1 KB Created: 2020-08-11 10:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037a0e4c036f296a9c6363e99dd4c43e SHA-1: 541e522f99a2844d5f3776b5dc018b8fe94d11ca SHA-256: 25537e38fd9d57092cb9cea8811e386cc3147f151a049fe7ee94add85527293f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wb?keyword=all%20quiet%20on%20the%20western%20front%20chapter%206%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the book title and the malicious URL, suggesting a lure to a malicious site.

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=all%20quiet%20on%20the%20western%20front%20chapter%206%20pdf
    • http://files.aesopinstitute.org/uploads/1/3/2/6/132681660/2585823.pdf
    • http://files.bloomwhereplanted.online/uploads/1/3/0/7/130739490/gifen.pdf
    • http://files.zeenie.com/uploads/1/3/1/4/131453151/funatavad-luvez-luxenud-buwidasimudo.pdf
    • http://files.heartofyogarva.org/uploads/1/3/1/4/131437242/3823239.pdf
    • http://files.bonnieinfrance.com/uploads/1/3/1/4/131406433/e497163.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/14878519114.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/79245974051.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/2002_dodge_durango_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/premedicacion_de_anfotericina_b.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/liwadaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/vupesinenigof.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/java_interview_questions_and_answers_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/nuxexopagilobolezivimega.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/sq11_mini_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/73024244318.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/29971411645.pdf
    • https://cdn.shopify.com/s/files/1/0438/2516/8544/files/75617431000.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_off00007172.bin
dd3ce92b8b242cd3ade320e7deb13cd30da23c2ad444b6046edf4e86aac483be
pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5604 bytes
font_01_sfnt_off00008496.bin
5cb632c0a3d8055317496078f58211f4a9bdbf75da3927e855375cd279131a3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 10172 bytes