Malicious PDF — malware analysis report

Static analysis result for SHA-256 168be3b896707634…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 05:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6123a534a604d3d4c1b63d22abf89205 SHA-1: a9d1839131f9b97a43730deae9984e518a80a5ae SHA-256: 168be3b896707634f8fef58ff19720ee30b11461bd701cd69b84bfe9c1236835
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, including a critical finding of a link to known malicious redirector infrastructure. The document body, though obfuscated, contains references to a 'california disneyland map pdf' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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=california+disneyland+map+pdf
    • http://files.newlightwater.com/uploads/1/3/1/4/131453615/topuka_wumeninodugofa.pdf
    • http://files.ncahabboon.com/uploads/1/3/1/3/131380308/faserazorup-tudilepux-giderodig.pdf
    • http://files.cathysdoodlesandpoodles.com/uploads/1/3/2/6/132696018/pikusetifiwapolep.pdf
    • http://files.harrisonmha.com/uploads/1/3/2/8/132814241/185032.pdf
    • http://matifeg.cascadiasales.ca/uploads/1/3/0/9/130969060/403361.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/gidufomadiluwitexuraje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/jifupuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/tusomulin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/78109943921.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/bolokewotadogek.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/wrist_physio_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/ridonenixovunixafamarilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/74556815719.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/21504303113.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/business_model_you_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/mysql_declare_variable.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000654c.bin
c37924bc09b047057e669a9d98b5524352de8b0a20ed863eaf5906074c5eeb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 5196 bytes
font_01_sfnt_off000076ea.bin
391c41ee56417b4053e51889515b21108a755ce3ceaf09a3fd93993151a70043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 10544 bytes

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