Malicious PDF — malware analysis report

Static analysis result for SHA-256 338cb326dbe457ea…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 15:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc2051261d366cd971716fb20dbe5036 SHA-1: 0c550f4411005eebabc730e71ba392b883993614 SHA-256: 338cb326dbe457ea0432e585c474430d12c1731f6c4ab959c40b5c608f2fd07f
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document employs a social engineering tactic, urging the user to install a browser extension or update to view its content. This is a common lure to facilitate malware installation or credential theft. The document contains a link to a known malicious redirector, https://ttraff.cc/pify?keyword=command+line+linux+pdf, which likely serves as the initial stage for delivering a secondary payload. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm for SEO manipulation or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ttraff.cc/pify?keyword=command+line+linux+pdf In PDF document text
    • http://files.dubsandtrebs.co.uk/uploads/1/3/1/6/131606335/rikidugusewux.pdfIn PDF document text
    • http://mades.jamfinearts.com/uploads/1/3/1/6/131606289/netavem.pdfIn PDF document text
    • http://tikur.acracrew.org/uploads/1/3/2/6/132695471/fujotezego-zijuwixazo-nadekiviri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/46806376850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/kagan_cooperative_learning_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/kaluvaxezorisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/fraps_not_showing_fps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/50681539999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7803/7159/files/free_french_lessons_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/29298201236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/futexujajobok.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
🗂 Part of campaign: gracefamilysudbury.com 4 samples

Related samples 1

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_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 4888 bytes
SHA-256: 13f8b8bbefcae011b9b77c339427cd21bb3a0470eb8143a3ac7a61078b8205ad
font_01_sfnt_off00006fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB5 10196 bytes
SHA-256: 75274c5ded05b1e5789fa9f7d23b6c66d3bc010b77561abc73ec103b38699ef1

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