Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce5e4cb18b5335a…

MALICIOUS

PDF

31.9 KB Created: 2020-11-03 20:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be717d1f3219b1c28b0b6533241bdbf4 SHA-1: d69ac02d5d9b424b29b4282bd97df4514a68236a SHA-256: 7ce5e4cb18b5335a41850039c0d635f137f72bb84d6da686d5d128f0ba143aec
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=living+in+the+environment+16th+edition+pdf'. This URL is likely used to lure victims into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest a malicious intent to download and execute a second-stage payload.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cctraff.ru/strik?keyword=living+in+the+environment+16th+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f9a63822431c.pdf
    • https://nirorozarijax.weebly.com/uploads/1/3/4/3/134342495/1047023.pdf
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/felobegijaxojovi.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/folutudipafej.pdf
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/5b703.pdf
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f8ae5e640eee.pdf
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8eac77cb785.pdf
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f8d99ccce970.pdf
    • https://cdn-cms.f-static.net/uploads/4387241/normal_5f97ca240faac.pdf
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8ca096f35ab.pdf
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/4168735.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bubeto/19469664406.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000422c.bin
ee892e34a376744832a19116a751d8d893f7b1e457cfaab221c254571e5c3e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x422C 5244 bytes
font_01_sfnt_off000053f1.bin
6de6386242fc7f6a7890ebd92fabb611ff39b6fa59a2ba37be310482e658dce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F1 9132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.