Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef28b12c18b8e17…

MALICIOUS

PDF

76.6 KB Created: 2020-11-18 20:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5d00bb57455390d3ba38affa4faddb69 SHA-1: d0026ebac5ef0ead5aa990972e69a95075155b27 SHA-256: 2ef28b12c18b8e1746f14953b0fab9f683ac597d246609aa8b046ea3039ae642
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains heuristics indicating it is a malicious SEO redirector, likely used for phishing or malware distribution. The document body and extracted URLs point to a lure related to 'self-awareness worksheets therapy' which redirects to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=self+awareness+worksheets+therapy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8f723419db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_5fab280638d64.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/man_from_the_south_plot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_5fa62d7acb265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f8f45cd820ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f8dac77a1301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f91f75a21bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450147/normal_5fa5bdb2c17a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5f91e0f466df5.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/2591692266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5fb466e2c9855.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/examples_to_use_on_gre_essay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5f9af377927ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ee55.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ee55.bin)
    • https://uploads.strikinglycdn.com/files/d84d5a0a-da2d-4023-b26e-3280c2d079af/kibewejimu.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 extracted file (font_00_sfnt_off0000ee55.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5352 bytes
SHA-256: ed1018b1519d50f8a25554a320f75131cf2eccb67eba326263ba016bc856367a
font_01_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10796 bytes
SHA-256: 616336aa9e2621eb59f22f0901731b0855903f17a82bfb7863ac6bea7a38235a

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