Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e3e637ad342f7c…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 21:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9207d2c237f909e293967ee9ccef1a1 SHA-1: 873b23b25f9b04ff491dfa49b070a5dea610ee67 SHA-256: 18e3e637ad342f7c70281f4c93e9115a2cb02336d9788de0d23ab983244ea5dd
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation, likely as a phishing lure. The primary malicious URL identified is ttraff.com, which is used to redirect users to other sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content, potentially for credential harvesting or malware delivery.

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.com/pify?keyword=swift+algorithms+and+data+structures+pdf In PDF document text
    • http://ninopezo.fringedbenefitsdesign.com/uploads/1/3/1/8/131856772/2336926.pdfIn PDF document text
    • http://files.the-tan-can.com/uploads/1/3/1/4/131413678/diponujeje.pdfIn PDF document text
    • http://files.klarahorackova.com/uploads/1/3/1/4/131437702/zunetamilezuju.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/1/0434/8759/2608/files/fegaburikolexagawilugiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4193/8856/files/rorojapawom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/24283844366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1151/2232/files/jelesedawapatikazakiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/jhumka_gira_ray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/exalted_name_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0983/3117/files/43121742419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/87646060665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/12955272724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/baby_sitters_club_books.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
🗂 Part of campaign: klarahorackova.com 3 samples

Related samples 4

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_off00006bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCF 5764 bytes
SHA-256: c4c0947707d10a09942d01a80f705500398005e2d26237b81cbc503b01488e8a
font_01_sfnt_off00007f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5E 10672 bytes
SHA-256: 1597a20d4abef0e20eef84fe24743460d27c547519e14454d67eb4d01a562475

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