Malicious PDF — malware analysis report

Static analysis result for SHA-256 827eb9ba8ed23d42…

MALICIOUS

PDF

59.0 KB Created: 2020-12-22 02:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da58290a874342c50683b945e1f49c1 SHA-1: 1c625deb450394120be7d52905ddd4d9959bbedb SHA-256: 827eb9ba8ed23d423b6c08a36b47a34bc160de32ae8e10c6a71b356925424b56
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=octopus+64bit+apk+3.+0'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=octopus+64bit+apk+3.+0
    • https://cdn-cms.f-static.net/uploads/4410975/normal_5fa6835fb47c1.pdf
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f963ec7baeb9.pdf
    • https://cdn-cms.f-static.net/uploads/4420604/normal_5f9e93d7b7530.pdf
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5f9d85f9b6de5.pdf
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5f9c71d392080.pdf
    • https://cdn-cms.f-static.net/uploads/4501791/normal_5fb388d6b8645.pdf
    • https://cdn-cms.f-static.net/uploads/4503617/normal_5fc30f1f0ccd2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/genedonapubefe/57146565816.pdf
    • https://static1.squarespace.com/static/5fdff99b3fde9411a280964c/t/5fe0647bf11f517dbbf53959/1608541308719/ashes_of_love_eng_sub_free.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_off0000a7aa.bin
2758d709068ff254c2f967c975153da69de966ad319f1e4943e536ce10e078a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AA 5608 bytes
font_01_sfnt_off0000bad6.bin
f3b3120b6110ee64025a349b56571e5b147e91ad540be8b9a18bdb8e7358d54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD6 10468 bytes

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