Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83171acf05353ac…

MALICIOUS

PDF

43.0 KB Created: 2020-09-30 05:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31b11a1836f31caa65de91fd6996054 SHA-1: 857aa989d76accec1328f1599ad28228420ae001 SHA-256: c83171acf05353ac94eb467b707e46038fc2eb08118e9fac8d26ec2c86fa32aa
90 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL. This suggests a phishing attempt to trick users into downloading further malware or visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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/strik?keyword=amityville+horror+book+free+pdf
    • http://fivibiwe.2ndkitelife.com/uploads/1/3/1/6/131636698/2d19d962e3bd.pdf
    • http://files.truthfulart.com/uploads/1/3/2/3/132303010/nunolixaximeliwem.pdf
    • http://voruke.looprenovations.com.au/uploads/1/3/0/7/130739693/jepurafiso-bunev.pdf
    • http://files.famusshp.com/uploads/1/3/1/8/131856306/1a8cad75.pdf
    • http://files.mezfantasypublishing.com/uploads/1/3/1/8/131858661/fatumebiwokuv.pdf
    • http://files.sarahivill.com/uploads/1/3/1/4/131410012/mapemagada.pdf
    • https://uploads.strikinglycdn.com/files/32984fa2-7dbc-4b95-b73f-ff74443255c8/14894479131.pdf
    • https://uploads.strikinglycdn.com/files/0aa10857-f2a1-4ffc-8828-a10846d8e351/21560627191.pdf
    • https://uploads.strikinglycdn.com/files/d5202f53-7cdf-4c64-aac1-8cd836b579a8/76837475416.pdf
    • https://uploads.strikinglycdn.com/files/5ae6a8a1-f65d-480a-a78f-8c0c08657a2b/wojujisobuzusakitejixuzim.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/39295451023.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/finupaja.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_off00006a84.bin
3a4fe3ed6dea2dd551f03e0b05fbd5adae70550abcceeda93a929fddc7248833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A84 5248 bytes
font_01_sfnt_off00007c40.bin
8775b9d989ae1ef17eb2ad69f99916c2411e41a83ddadba917404a1daaf08084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C40 10320 bytes

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