Malicious PDF — malware analysis report

Static analysis result for SHA-256 711ccbce87c23c9a…

MALICIOUS

PDF

87.5 KB Created: 2021-01-16 13:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 051811a18451560807f8b18e880ab584 SHA-1: 20e4d2af34f259f7e4f74548978d3d5ec6bc0405 SHA-256: 711ccbce87c23c9a602756bf7f62fe8b1087547420d4ee0ab2d35067608719ca
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://cctraff.ru/aws?utm_term=hypertension+guidelines+2017+slideshare'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious infrastructure, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=hypertension+guidelines+2017+slideshare In PDF document text
    • https://cdn.sqhk.co/pekobenew/GwD9Rgh/gabaveragiza.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/jVQhjhi/73597416950.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/XHhj89x/planet_fitness_membership_transfer_fee.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/SggfiiR/1747607551.pdfIn PDF document text
    • https://site-1178471.mozfiles.com/files/1178471/biblia_takatifu_ya_katoliki.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/4PmOa2w/8420360385.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/zumezeviwakiz/layers_of_the_atmosphere_worksheet_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/xikufojefo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/super_mario_maker_rom_download_nintendo_ds.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/car_games_free_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/cyborgs_heroes_never_die.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/hernia_hiatal_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/happy_onam_2019_images_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/mathematics_textbook_for_secondary_school.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 5688 bytes
SHA-256: 11cc170e330e301a297af07b9c23eb6de6a10ebadad6d088a815525f41252863
font_01_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 10820 bytes
SHA-256: 51869ff0891a010832a4bfdb75f2e3cd0acbd060583ffefb9ea1d72c8139d0c2
font_02_sfnt_off00013bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCC 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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