Malicious PDF — malware analysis report

Static analysis result for SHA-256 3865d3201913427a…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 09:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c6566c8817cc9d083762e726ebd1f1 SHA-1: bf5271e523dda6ec32d7f1f1eba119d300cc66c7 SHA-256: 3865d3201913427a2f0b3d5b44c96f9132017863f54302382f951fe75f5894bf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely to appear legitimate. However, one prominent link, 'https://ttraff.cc/pify?keyword=maths+calculus+formula+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting malicious sites by disguising them as academic resources.

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.cc/pify?keyword=maths+calculus+formula+pdf
    • http://radobol.multnomahchannelmystery.com/uploads/1/3/0/7/130739718/tawor.pdf
    • http://files.greenlakeartist.com/uploads/1/3/1/4/131438641/7110611.pdf
    • http://files.jpkwan.com/uploads/1/3/1/6/131606739/62d9de8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/lofejit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/baresapolumulu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/adjective_endings_german.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/giboxig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/zakaguzekadokifibamam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/ncert_biology_class_11_chapter_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/71789321250.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7333/files/duwodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/dakuzasufolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/reglamento_nro_22_de_carabineros_de_chile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0434/4833/6536/files/ley_de_bienestar_animal_guatemala.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_off00005e7c.bin
317192d2a517462b88dbb9356c546df0126f5be352269b8becedb2100de559e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 5400 bytes
font_01_sfnt_off000070b3.bin
ae861cf1532186a788290c02247d880b970d96d7be079f26a09f051cf916ac1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10284 bytes

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