Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6ec3067c36915f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 12:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf3795a6c898337d5977193621098eda SHA-1: d6ccfa77e2d299a081083a2f83a46e0b93b202d5 SHA-256: fd6ec3067c36915fb4b06e0eb1de7dd0ed0b032b7bdf36ed202e5932734bd698
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and redirects to a URL that appears to be an SEO spam redirector, likely intended to lure users into downloading malicious content under the guise of free educational material. The ML classifier strongly indicated maliciousness, and the presence of numerous links to external PDFs supports a content-luring or phishing attack pattern.

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=basic+guitar+lessons+for+beginners+pdf+free+download In PDF document text
    • http://sinukunik.thegreatwines.com/uploads/1/3/1/8/131857631/6819085.pdfIn PDF document text
    • http://files.awesomepawsacademy.com/uploads/1/3/0/9/130969003/d6be4b09c.pdfIn PDF document text
    • http://files.silverstreetlutheranchurch.com/uploads/1/3/1/4/131437576/9591de4f.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/1/0430/0718/0954/files/97750794239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/nodud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/30016044535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/85072227409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/rileputef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/25031265921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/lion_s_arch_exterminator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/94163846721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/dugamos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/rolijajonowuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/43374992419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/dezosebobugi.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_off000066b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 5604 bytes
SHA-256: 8b4192c024cf08c78af2d1d9543c080827ad5a1e352091872fe7938b3446a2cf
font_01_sfnt_off000079e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 10204 bytes
SHA-256: 72d91c0c7b07aa2a986ded61cc80eafda9f481698196d5339a6f429378256617

Open this report in the interactive analyzer, or submit your own file for analysis.