Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae870ce19e41f42a…

MALICIOUS

PDF

76.6 KB Created: 2020-12-30 00:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b5d5df017d8f3bfe9c7f387c7df7dcfd SHA-1: ee115bb5cdfe4be6fc1af9ac7f5cd283b85aa2ee SHA-256: ae870ce19e41f42abade23d4607620fd1525a390e411cb5e9f138e1b6ceddd0d
194 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://gettraff.ru/strik?utm_term=my+hero+academia+wallpaper+iphone+8'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=my+hero+academia+wallpaper+iphone+8 In PDF document text
    • https://cdn.sqhk.co/luwiwaduna/VTvc0Px/general_knowledge_quiz_2020_funny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5fb7193e2b69e.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/Wghhigc/led_controller_apple_home.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://s3.amazonaws.com/belopudevuzuza/scott_middle_school_yearbook_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/gun_mayhem_unblocked_5.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/vosetudaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa49656-ad24-46eb-ae84-8733b717dd9d/ventajas_y_desventajas_de_aspel_noi.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/practices_of_looking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2f8c6a-7b61-4ea0-8251-96a207861f66/sogokifediwe.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/49227919463.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/mufafoxekipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0ceb22-5020-4dd6-a8c2-0c15c07c860d/ritejiko.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/shepard_smith_reporting_fox.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_off0000e153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE153 5236 bytes
SHA-256: 5f80acb33ec464aea64141825023a58795a6b502f0b3597f09b2561e3540075e
font_01_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10588 bytes
SHA-256: 781a3545cc21f6ab81b646149367a9d7e06f2fb724403c3685d2f4f9f169737f
font_02_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3