Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d569cb827522c9…

MALICIOUS

PDF

65.3 KB Created: 2020-08-11 22:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf3142b0c164146671849a797c194a8f SHA-1: 22d037899791b5dc52156677ff038087f356579e SHA-256: 20d569cb827522c9f62a7ae2f3e4f0dfd619bfcfa09b7ab989d47aa2a6a0e7fd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This indicates a phishing attempt to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, limiting the analysis of further payload delivery.

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/wb?keyword=kalendarz%20liturgiczny%202019%20pdf%20katowice
    • http://files.wakefieldperformingarts.com/uploads/1/3/1/4/131437423/b65388ebed.pdf
    • http://files.backyardheavens.com/uploads/1/3/2/8/132816106/ridiloviv.pdf
    • http://files.rockymtnblueticks.com/uploads/1/3/0/9/130969313/pamugup-wonafiga.pdf
    • http://files.katsmodernizedhomedecor.com/uploads/1/3/1/4/131453484/sonumiwikibebazekubu.pdf
    • http://files.rockymtnblueticks.com/uploads/1/3/0/9/130969313/pamugup-wo
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/jemuwoxijifivefudax.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/39005839944.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/34389509743.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/nilotelulupakasejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/38907248690.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/77518955657.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/4841046446.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/68613009886.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/how_to_mod_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/47675297771.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/vejoraluvuravonuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/piano_music_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/mogudiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/26500322270.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab27.bin
1dc82c178240d0899889260f9dee515d3f70e60b77c792b5043e47e8ad51b9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB27 5452 bytes
font_01_sfnt_off0000be29.bin
e196d2b7440d7186372100dcd45009a52ddded392c6819dd61f5685983f39e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE29 5904 bytes
font_02_sfnt_off0000d278.bin
fff4deb5213e4b3ecfa6c01d30c19d4979450dca6c7c34bd2262d1ace306f811		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 11360 bytes

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