Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e62cbfa3e0e846…

MALICIOUS

PDF

33.6 KB Created: 2020-10-28 10:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b9f346fb46972afd61d61f7ccae81022 SHA-1: 7d3e9d098cf993b0910e8aadbcdd288f6ad2a933 SHA-256: 60e62cbfa3e0e84650187b0fa7075f98ae1e8125bfabb6c02cfd83ccef1bb76c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/123?keyword=d%2526d+xp+levels'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0432/5854/4292/files/summer_jacket_mens_flipkart.pdf'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains these URLs, suggesting an attempt to direct users to potentially harmful 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.cc/123?keyword=d%2526d+xp+levels In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f895ea7179b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f8cbf8d43a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8a032766a01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5854/4292/files/summer_jacket_mens_flipkart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9633/4232/files/mighty_mule_gate_opener_troubleshooting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9616/2711/files/fimonubivunejuve.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/xomotezepuwis.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/ptk_agama_hindu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/91494178076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6534/7748/files/6229440012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0648/3389/files/egate_i9_android_projector_flipkart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9572/7007/files/qurb_shot_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6303/1957/files/pregnancy_app_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0240ac70-163c-4a9d-9631-1972a7b0280f/11101323188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d6f85f-e526-41c9-b94e-eca9507fba7b/86810360593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563e679b-dd3b-47a7-8cea-712ddab0cb01/2660693727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c3b27b-8d9d-4187-920f-1d4330d5c521/73589973181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/murevazaliseduzitabalitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/selective_laser_sintering_sls.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4876 4156 bytes
SHA-256: f160675c5580dff3c73b34ff7910be5a3b332df7dca2dd9ff89af35a2593c860
font_01_sfnt_off000056a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A3 10332 bytes
SHA-256: d2e1b7d5677b67feb8fdf7c7853792bdc976a403b66e8012596be32bb063fbc5

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