Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf91a2b9eb272c9…

MALICIOUS

PDF

67.5 KB Created: 2020-11-21 23:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c9082d0b5ecb79c5fd4d64f751405274 SHA-1: b6a7aebe00de44c5c6561845a0a3f755436d98cf SHA-256: baf91a2b9eb272c9b565a9c3004f72d605872c908e28e73ac8ae8c6518a13d8a
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=airport+transport+sarasota+to+tampa'. The document body, though heavily obfuscated, appears to contain text related to airport transport, suggesting a lure. The presence of a link farm and ClamAV detection further supports its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=airport+transport+sarasota+to+tampa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_5fa997794962e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5f950f8821796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f873f0570e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5fa093795f0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fa0c5d438988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8846397595c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8abaee65258.pdfIn PDF document text
    • https://wapifonobuj.weebly.com/uploads/1/3/4/7/134744781/sovidafe_xoxijenekaboxuw_sokizolepe_fenabewate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f8e6da716d58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufupu/minions_2015_subtitles_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/antenna_and_wave_propagation_by_k_d_prasad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024e780b-ea5b-45ac-b772-412e4546fd0a/zenafojarububap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47d77aa-a01e-494a-8d15-92e2251304b9/cause_effect_diagram_template_ppt.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_off0000cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 4920 bytes
SHA-256: 14ccda96ab9148d45ceb03b934b6393cac7b41ce6f3094aab641bf274a5f9707
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10980 bytes
SHA-256: 6a98b568180eb7e4e55f4cf945eaef7924de2eb38de82c4a8406a770046f85cc

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