Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3114fe6ad8befc…

MALICIOUS

PDF

43.5 KB Created: 2020-10-31 14:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74af393b1c9399ef8e8f9b2e7f30fd3e SHA-1: 1ad183eac6a23c068f9a53b17c3f17279a000d3b SHA-256: 0d3114fe6ad8befc91fec07026e8499473c3c1d3173852c6cbafc8b07d7407ae
152 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which, https://gettraff.ru/aws?keyword=samsung+46+inch+tv, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gettraff.ru/aws?keyword=samsung+46+inch+tv
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f895761f026c.pdf
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f8bcd3c69151.pdf
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f928ed3433b8.pdf
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f8b373347fbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0481/7276/1239/files/82916322718.pdf
    • https://s3.amazonaws.com/vabedafozo/lego_hero_factory_instruction.pdf
    • https://uploads.strikinglycdn.com/files/eeff3583-217f-424d-a75e-306afa3c0385/2448522809.pdf
    • https://s3.amazonaws.com/sugaguxagu/goldman_principles_of_clinical_electrocardiography.pdf
    • https://s3.amazonaws.com/jebokizez/scratch_jr_manual.pdf
    • https://s3.amazonaws.com/tapexiw/20330281249.pdf
    • https://s3.amazonaws.com/degerutisig/simbolos_de_poder_y_proteccion.pdf
    • https://s3.amazonaws.com/donake/algebra_1_puzzles.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007df2.bin
c4a85157572e7bfb2efb0164bb6b619892e5765694ade11aa288d2b2fb8710dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF2 5488 bytes
font_01_sfnt_off00009093.bin
364055419db307970218b3f1300d4ef0ce448765a7ab4c318709c7ec7033b07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 10496 bytes

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