Malicious PDF — malware analysis report

Static analysis result for SHA-256 941ce2f0da2b898c…

MALICIOUS

PDF

53.0 KB Created: 2020-08-09 03:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce02fea95e5eed643753999a5d5f8f5c SHA-1: b3bf8cee76aba3ab5ec2d72bac9e31c6ae38f088 SHA-256: 941ce2f0da2b898c7a824cfef339accd50be9505f68c71d62a7fd50dedbce480
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body and heuristics indicate a "free download" lure, likely intended to trick users into downloading malware. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized links suggests a campaign to distribute malicious files.

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=libros+para+aprender+frances+desde+cero+pdf+gratis In PDF document text
    • http://files.readersandleaders.org/uploads/1/3/2/6/132682563/6701058.pdfIn PDF document text
    • http://files.hawaiirootsandbranches.com/uploads/1/3/2/6/132695258/lubufozirabijetav.pdfIn PDF document text
    • http://files.chimachancreations.com/uploads/1/3/0/7/130775382/2749565.pdfIn PDF document text
    • http://files.paeoniapines.com/uploads/1/3/1/4/131406841/gumezekibox_resuri_didodizo.pdfIn PDF document text
    • http://files.hallenelaw.com/uploads/1/3/0/8/130815009/4d0e33786d.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/1/0428/8148/2919/files/advanced_calculus_folland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/takokanasilavetevifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/nenavutoninedamakew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/jessi_brianna_nude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/rizoxopodutexinirefosub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/valafum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/sikonasobuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/the_gods_are_bastards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/anthranilic_acid_synthesis_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/nh_dmv_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/12764865205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/jugagurezenejavorinaj.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_off00008c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8E 5372 bytes
SHA-256: 689af29a17828649b66e9825ad8602cd1904197c5b1d707e589a1c96b2c9c5a2
font_01_sfnt_off00009ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDE 11612 bytes
SHA-256: 92c42bf39c48d5d390579df9eb02369f097fe19a92e4811dffdf12c0dc366f22