Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e07fc3800ca3635…

MALICIOUS

PDF

33.3 KB Created: 2020-10-31 22:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3ca8ea3f51754fb789ef998926ca141 SHA-1: ef24213bf59415719f207130971221e9164ada5b SHA-256: 7e07fc3800ca36356d66a392a1dd8c0074ba7b1d0e5678d9c6672691163bb76c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links and text that direct users to a known malicious redirector URL, 'https://cctraff.ru/123?keyword=sigmetrics+2020+program'. This URL is flagged by heuristics as a malicious redirector and an SEO UTM redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/123?keyword=sigmetrics+2020+program In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f8b4c28828d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f963269a9f08.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/jimugivos/como_te_extrao_cafe_tacuba_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/43808143368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b63177d-a552-4900-a6e5-0ffdbf9e68fe/nogebokigizof.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/puduwijadafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8437/2886/files/jura_impressa_s9_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/17122704402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8670/1256/files/tablet_phone_app_android.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

Related samples 4

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_off000044c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C0 5596 bytes
SHA-256: 34333d57cffed0deddb602b3b663c4f560ae49f29c03446f5a1da37f11ca53f5
font_01_sfnt_off000057af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AF 9716 bytes
SHA-256: 387e839908f7a77395091cf77fd54a376de2f72a4f0ba02c259877ad056e0145

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