Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aececffe21b5a6…

MALICIOUS

PDF

41.1 KB Created: 2020-08-04 07:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36062e98272ebf0ab707d3efe7d57b82 SHA-1: 3abfe1bde4f86da35632a21391b5433080e765bf SHA-256: f8aececffe21b5a61263bca84b0597a7b6570204ae41ab7da1a922ec12a6b8e8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to what appears to be a link farm designed to host SEO-optimized PDF documents. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect users to malicious content. No scripts were extracted from this sample.

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://ttraff.ru/pify?keyword=buoyancy+example+problems+with+solutions+pdf In PDF document text
    • http://files.anitagate.com/uploads/1/3/1/8/131856723/fb834d3456db4.pdfIn PDF document text
    • http://jagalo.kreweofjesters.com/uploads/1/3/1/0/131069839/vakorumuj_zazedifo_busivusujararus.pdfIn PDF document text
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdfIn PDF document text
    • http://files.artistangst.com/uploads/1/3/1/1/131164252/bujurikoxavolox.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/1/0436/7712/2713/files/lenova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/discord_rule_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/vumevovegagutubunawopiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/tegafozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/13651011159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/97_dodge_dakota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/bajuvijetuwiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/koxokiverepakegemezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/miriligelusalopikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/bexobemopirufixafufuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/fivedivuto.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 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_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5848 bytes
SHA-256: 81a559e8e8b05e80ef76239aede72f510b3971ab0327232667ed01b93c3931ba
font_01_sfnt_off00007317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7317 10812 bytes
SHA-256: e1ea6faf0413cb259cb88d036cbe5dda07a9fd8a632151ad4f26ccf5cc2a10e7

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