Malicious PDF — malware analysis report

Static analysis result for SHA-256 feca4fa17d6e9195…

MALICIOUS

PDF

33.0 KB Created: 2020-09-10 04:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b108b160cecba93355aff57c7b6291c SHA-1: bf3ffb6002123898fd8fa0bba54616c381f369cf SHA-256: feca4fa17d6e91953f6c8e3174941bcaa596129490bf36f00b1b7193b27b13c5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to redirector domains or known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users searching for specific content, such as sheet music. This suggests a phishing or malware distribution attempt.

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.link/wix?keyword=happy+farmer+schumann+sheet+music
    • http://files.moraelemart.org/uploads/1/3/1/4/131406544/pitosagofibas.pdf
    • http://files.southsidetees88.com/uploads/1/3/2/6/132680986/sudarojeze-vulisiwex-sumazumotorame-vigateto.pdf
    • http://vorupu.waysideresources.com/uploads/1/3/0/7/130740062/jagipi-telanatigu-lapoferekepo-seviwevelatew.pdf
    • http://tofok.neonlizardcreative.com/uploads/1/3/1/4/131483108/dupike.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/ruxetinerozegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/84678006813.pdf
    • https://cdn.shopify.com/s/files/1/0431/9100/9442/files/limop.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/fakazenele.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/wilajewenutazun.pdf
    • https://cdn.shopify.com/s/files/1/0436/0739/2413/files/33667047987.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/jarebokadobazobi.pdf
    • https://static.usrfiles.com/ugd/17beed_49a34281af7441b2909fac3489d28eb7.pdf
    • https://static.usrfiles.com/ugd/7a359d_4e086fb95718493cbc3017587a2f23ea.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_off00004441.bin
fb9fd4520fdcc2da294d2c0905f41618b7ecf354f87f5adf5f424fe35b3fb2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4441 5284 bytes
font_01_sfnt_off0000561f.bin
40a15475b66a111163158bf51f0d0ae12160068efdf123ecc588303abe7b7643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561F 9732 bytes

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