Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ced22e39d48acbd…

MALICIOUS

PDF

66.7 KB Created: 2020-11-27 22:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed20cb4ec2f07125c0b3272e9ae6f1b6 SHA-1: db878686fad203166f6b5f9393c69122c708a324 SHA-256: 7ced22e39d48acbd3760a13b6d423376574f962d1423c4e65d1511b92740c89f
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ggtraff.ru/strik?utm_term=victorian+childrens+shoes', is likely used to direct users to a phishing or malware distribution site. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/strik?utm_term=victorian+childrens+shoes In PDF document text
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/2154952.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b50c1c4f-ef79-48e6-8af3-8128ebdb57c5/sibugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/vewuziwowelapujedijimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dfa789-99fa-447c-b842-9b913542d46e/bblia_de_estudo_holman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7374da8-6046-49a5-86e0-e1ff3564a966/38655831875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b22229-e866-4fc3-94b9-012d3c33b9c1/everwilde_farms_seed_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58486fbf-92d8-4a6f-951e-44ecaa81d458/tadilijizurumored.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2072815f-0859-4dec-8d72-76ea33317396/5418825422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7db534-7e0a-4ad9-946e-36b70b6bab0f/42716114440.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF6 4780 bytes
SHA-256: 5847e82477a1d7b225132a72c8f605833adda360e227d14a0dcaeacaf0097e93
font_01_sfnt_off0000cb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 10988 bytes
SHA-256: f52ba6fe863a4186138a0e9c85d74fd402f94797559ffa3c6feb619f4958d7e4
font_02_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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