Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9cf9ec4f04b4dd…

MALICIOUS

PDF

58.2 KB Created: 2020-11-24 06:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 522ab21dd4ed9fbc5d5f686e46bf6185 SHA-1: 7983e0803cec7661a7f5d512932194735d6de08c SHA-256: 3d9cf9ec4f04b4dd0ba7679cf783ef0326391670e58ffd257fa73ed810022f3c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://gettraff.ru/123?utm_term=drama+task+cards', are likely intended to lead users to phishing sites or download further malware. The presence of numerous external PDF links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/123?utm_term=drama+task+cards In PDF document text
    • https://rujemadatidugu.weebly.com/uploads/1/3/4/7/134747735/jusalojulu-webebog-difuvejowe-sigakomonalux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5fa1fbd0a6985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a5e4e2-9d65-4281-be25-58d9c87ceb64/xepifogolifokifebar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57439a86-109e-4349-b7aa-18869ce6b127/rojufitogizap.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/the_duchess_of_malfi_text.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/alcoholicos_anonimos_argentina_informacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bc6068-495c-4e63-a2d6-02d6d8927573/54096894350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca20b91-8b72-4da4-b6c5-f00182fa39cf/35427052690.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/sewanagod.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/jinja_template_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/bavazuwirofajum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d781d195-c339-4665-89ab-c77c6f4fa52d/32033748501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc237c5d-d504-4757-90c1-90be423829c2/readers_and_writers_notebook_grade_5_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CE 5116 bytes
SHA-256: 183f9335b9bddc04df4312cfc0e27e923b9e7bd3293b64be277e88681ab7daf8
font_01_sfnt_off0000bb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB23 9748 bytes
SHA-256: b57590968460223726e629367ffa9152e9337b2b87ca00b254ac30b9a433afbd

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