Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7eafbca37077f0…

MALICIOUS

PDF

80.8 KB Created: 2020-11-24 02:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 573e04f36b7bad607b238aca018bcaca SHA-1: 3b37426d5293a9ed1f85ffc3866c9cfb61562351 SHA-256: dd7eafbca37077f085aa993c11df32b6fdd80475d348d4d4a84f65eb858b7f8c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically identified as a redirector for SEO-based phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=realtek+semiconductor+corp In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fb8298e17d99.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/60332f47b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_5fb9b6b1419a4.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://dizuxegukus.weebly.com/uploads/1/3/4/6/134624336/1037919887e5c.pdfIn PDF document text
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/3421007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5fa23843f1982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_5f99f1ec1eeae.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/visojuridareju.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/bisute/pisepoterajevog.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/launch_android_emulator_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/diximu.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/sacar_curp_nuevo_formato_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/18917679523.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 11500 bytes
SHA-256: 36b89cb20e6ef2ee55b04197b586763eb8b4b35f5dc215fc3157d2d3c67f1b75
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 5324 bytes
SHA-256: 5900e4e7c1d2f4b1c2ff6d5d6d5187fb1bd5d58f581d443a46d8f7b2c84b1834
font_02_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 11360 bytes
SHA-256: ab358b630b032667fe48d8c6a1c34ec88175fca013559c8ba73805bfabf1ed8b

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