Malicious PDF — malware analysis report

Static analysis result for SHA-256 80027e9c40b46604…

MALICIOUS

PDF

65.9 KB Created: 2020-11-13 06:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5fde6fd413abc62f5619d973e88805be SHA-1: 23d75205dc717768b8e7670c3cd61aa41308b62c SHA-256: 80027e9c40b46604c738c6d8a3819247eaa0ff14e0ce2577e9cf5c6f1c03e9df
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical finding for a PDF redirector link to known malicious infrastructure. The ML classifier also strongly flagged the PDF. The embedded URL https://cctraff.ru/aws?utm_term=cardiac+cycle+pdf is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=cardiac+cycle+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/tajafuzaxuseneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f940bd-e415-4bc2-8682-18c51a18a056/sepojexi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/iste_2020_presenter.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/81540483041.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/back_to_school_poster_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/jp_enterprises_jpoint_micro.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/jetutokisipej.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/vavapoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e6ab50-7a80-4f2a-8f37-c742eca31199/himno_ala_telesecundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685ad826-e093-4743-8372-b4a366b1832e/15657023761.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/37183819178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84749305-5541-4aad-911a-55fd86a9174e/15084960978.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/malesetasova.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/giant_steps_chords_progression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ef5381-7ae4-4663-9d0c-3eb340da67ce/mega_filmes_online_grtis_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa19a95-67ad-4ba9-8058-a4df510e5957/fosevonevin.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_off0000c985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 4976 bytes
SHA-256: f33dbfda69f29f75ffbb578288c5fa1225a0884298b8f71ba094404087643c1e
font_01_sfnt_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 9664 bytes
SHA-256: c3a0745fa2fbe16b7db6d32bdb5ecb3466187ddd8c279ed975484aa077c7f24b

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