Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbb3b1142ccc949…

MALICIOUS

PDF

46.3 KB Created: 2020-08-12 01:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d075d8ed061edeaeb7584ab5ec7ac64e SHA-1: 007206998b1f6be7698281d7d110150d8dd3ce8a SHA-256: dfbb3b1142ccc949818bc87dc26507a72693d7345462bb96e68747a61b7194af
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a 'pdf reader download offline' keyword. The document body itself contains obfuscated text and multiple URLs, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL, which is likely used to serve a secondary payload or phish for credentials.

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=pdf%20reader%20download%20offline In PDF document text
    • http://files.guruacademicadvising.com/uploads/1/3/1/4/131407818/9341568.pdfIn PDF document text
    • http://ritevum.liretondesigns.com/uploads/1/3/0/8/130814297/5086061.pdfIn PDF document text
    • http://xosem.norwoodcafe.com/uploads/1/3/0/8/130874197/2503101.pdfIn PDF document text
    • http://kabun.florencereview.com/uploads/1/3/1/1/131164250/2e14dbacee04.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/1/0430/5967/5293/files/wutegazajuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/jiverujixarexugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/causes_of_world_war_ii_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/kitupuzasufujimasor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofolevunukexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/64539844712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/dijajemaxarologovaxudakot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/78946339505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/sewuteke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/stihl_041_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/9943359379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/tumewanutesoxevota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7054/5308/files/vinaf.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 3

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_off000076cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 4816 bytes
SHA-256: b4906e262326e3db8a4805f42678bee58b50b21d698a128126d57becb0ff4e8d
font_01_sfnt_off0000874a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 10820 bytes
SHA-256: b23610a96532cec50c78b172256c6c9b75b2da3cf8e17dc86ab9a26a81ace20b

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