Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed60c7609f87c3cd…

MALICIOUS

PDF

40.1 KB Created: 2020-11-03 10:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f1fa134aa557ae82e7ddce7c7d2abf82 SHA-1: 3a152748cb8755e8261ade107af4a758620fdaf4 SHA-256: ed60c7609f87c3cdd8132f5b6ee06bd5ddf76c7baf848ee795926f75cc0283c7
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Seatgeek ticket refund policy' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?keyword=seatgeek+ticket+refund+policy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f92014bce883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f95878e9ebe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f9d2e947eaf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402745/normal_5f93836441800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5f99b68ab213f.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/zirojopemup/koxoxadosulovojaxexusewov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1902/0706/files/tinder_gold_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xakafubezifuvix.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/parallelogram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/futatexenuniwefubivuzipin.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/jorozulum.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/child_centered_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/socialism_communism_and_capitalism.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_off00005d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5416 bytes
SHA-256: 34e774f89f8adb78b867b448d0c70053daed34bdab2cd6cefd28fdf2a02ac6db
font_01_sfnt_off00007027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 10480 bytes
SHA-256: 44a055f883155726603444f4c9052813f00cc7930defed922583680649c2d928