Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdf58208f199065…

MALICIOUS

PDF

82.5 KB Created: 2020-12-28 08:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2e6f6eb9c61867e1dd6f6d283f7c2d11 SHA-1: e355f776fe3b50208f3a06a026370e6eb5b85e82 SHA-256: 6fdf58208f199065de5c0ad1dba8bd500b1262b642975a227af534100c42fb5d
194 Risk Score

Malware Insights

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

The PDF file contains a lure related to a snow report, designed to entice users to click on a link. This link, identified as a malicious redirector, points to 'cctraff.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://cctraff.ru/aws?utm_term=la+villa+alta+badia+snow+report In PDF document text
    • https://cdn.sqhk.co/birenejar/ghgjifY/91711113098.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/47WIhiI/easy_top_up_three.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/jjjh01w/golf_practice_range_for_home.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/vofowavetegovumuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649c2c82-bd73-4d32-8578-7494585e887c/2374904535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9700c5c1-c6cf-4fe7-9e27-051bf7709707/sonajujogizete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971a52c8-1248-4c50-a3a3-d49200b77709/pelicula_inocencia_robada.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/voltas_air_cooler_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/ffxiv_monk_rotation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61de3650-5994-4e13-bd89-9e08e1016ca1/96104292973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95c6787-8071-434b-ae11-10b3617fa03e/siege_of_stone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b8b2f0-3e3b-4ade-982b-2e014b0b73d1/98242144140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c4474c-39c2-4eca-9b66-e33f53d5d6d8/odds_and_sods.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_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5184 bytes
SHA-256: 110b3b2167cdb1c1b7363512a79f356d13682206dcf0394d6d876c10006a9f90
font_01_sfnt_off00010118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 11844 bytes
SHA-256: 2deb7069c6bc40f6a1bd93ef96ee6c9e670d4a5727af2de807c1b88cef1916a6
font_02_sfnt_off000127f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F8 5876 bytes
SHA-256: 0405e8da7f8b0d8ed4f70d33645eaea5132cdb8a4df4e12322877b79ecacc5bf