Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62bca3cdd258e8f…

MALICIOUS

PDF

58.3 KB Created: 2020-11-16 16:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40e9ed3076f7748e5c6e6c07afb82d0b SHA-1: 53694bc80a612daab6ce6e61e197093f27cc8451 SHA-256: b62bca3cdd258e8fe746ad9c22587cedb87eee4d92ca808301d12932fbc2b006
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=reebok+dmx+max+womens'. This URL is likely used to phish users or deliver a secondary payload. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=reebok+dmx+max+womens
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f9798c3163a3.pdf
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5fa790f6eae18.pdf
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f891016a2286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fokapikow/indoor_dog_kennels_for_sale.pdf
    • https://s3.amazonaws.com/dutuzanob/36963879388.pdf
    • https://s3.amazonaws.com/wixamupelinere/malewiseniberapijafaner.pdf
    • https://s3.amazonaws.com/xetasif/18071299038.pdf
    • https://s3.amazonaws.com/doxifuba/76068323674.pdf
    • https://s3.amazonaws.com/tibitexil/whidbey_island_ferry_schedule.pdf
    • https://s3.amazonaws.com/kopisigapub/52085736516.pdf
    • https://s3.amazonaws.com/xifabilejilab/50_cal_rounds_per_minute.pdf
    • https://s3.amazonaws.com/xanebavifamopez/nekakorujizezimogejaraxix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a876.bin
95c196cd44dfcef26f0fbf2aae40fe99af1622636bf691f69a1a838532a7315f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA876 5216 bytes
font_01_sfnt_off0000ba3c.bin
edd014d28767d1610c9e2e409e293c730efbdbe6a695e3d51e272af6a2d3b718		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3C 10112 bytes

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