Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec31a595fdc44285…

MALICIOUS

PDF

42.4 KB Created: 2020-08-13 02:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d459d20032e13576a373c72a8b70191 SHA-1: 7741f9b4b22e1ddbb8a021572d07a45678872359 SHA-256: ec31a595fdc4428508035afd7226cf5f4f6799f72077b24871ff316affcec230
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/wb?keyword=de%20eetclub%20saskia%20noort%20pdf', points to known malicious redirector infrastructure. The document body is heavily obfuscated and contains a large number of URLs, many hosted on Shopify, suggesting an attempt to disguise the malicious redirector. The primary attack pattern appears to be luring users to malicious sites via a link farm.

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.cc/wb?keyword=de%20eetclub%20saskia%20noort%20pdf In PDF document text
    • http://files.lizhardleyimages.com/uploads/1/3/0/7/130739616/gijujagenine.pdfIn PDF document text
    • http://budirewox.craftyrabbitjigs.com/uploads/1/3/0/8/130873958/8282169.pdfIn PDF document text
    • http://files.lizziedavey.com/uploads/1/3/2/7/132740700/zunoxitepu.pdfIn PDF document text
    • http://files.8thdistrictlay.org/uploads/1/3/2/6/132682994/adeda9114a33.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/1/0432/5074/5512/files/jilosunonevud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/functional_areas_of_business_organization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/alto_saxophone_major_scales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3993/5912/files/blood_relation_for_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/zekiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/tumoxogot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/iit_jam_2020_mathematics_syllabus_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/xixepabujuxokugupevuvexaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/kepup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/83042899724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/anatomy_trains_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 5352 bytes
SHA-256: 33d69150e4d5e5af485c939105fc3311e02626d78947c6d7f32275fdaaf4fdf0
font_01_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 12516 bytes
SHA-256: 05578ccf25f1cc7b5dbfaf08782ab3468f7aac644a34e57c563ca3b700ed97fb