Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cae870c13e643e…

MALICIOUS

PDF

47.3 KB Created: 2020-08-06 14:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88ad269b08696c140f806f195e747d9 SHA-1: 4377e1e56cbbfa7eb06b559fd589acb605ed7b13 SHA-256: 54cae870c13e643eb4e3e65be8aedeedc73b4ce5f184cd099884add9f7951a82
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=expedicion+botanica+nueva+granada+pdf'. Another critical heuristic indicates a PDF link farm, suggesting a broad distribution attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL and references to botanical expeditions, likely serving as a lure.

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.com/pify?keyword=expedicion+botanica+nueva+granada+pdf
    • http://fobato.crispusattucksalumnilettermen.com/uploads/1/3/1/4/131453645/33830cd1dafe.pdf
    • http://budejesem.nineblamassu.com/uploads/1/3/0/7/130739564/097e5d1338c26d9.pdf
    • http://files.englishlutheran.org/uploads/1/3/0/8/130874317/fipejuvoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/navopetajerutajun.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/clinical_virology_manual_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/55108451628.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/laravel_guzzle_post_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/business_intelligence_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/cricut_personal_electronic_cutter.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/fofuxoneni.pdf
    • https://cdn.shopify.com/s/files/1/0429/3070/0455/files/60426211091.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/puzuga.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/lejiwomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/64799549826.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_off000078de.bin
de1e3d97cc8fbbf51805389f580e33a5c10b2db58d83da57013531d5dcf03d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 5340 bytes
font_01_sfnt_off00008b23.bin
099a58db5125588ed44422bc30aa26d628da864d42b293dda82b801ff8246d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 10744 bytes

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