Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0ca37fc83aa449…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 13:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1373d4706dae6c21bddf1789c3f4199 SHA-1: 39b56d572900cb7067b6f9f9c9f4c43d99da7b86 SHA-256: 4e0ca37fc83aa449c60be57764890d68cb784c272370cb3568e0a64da82e508d
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service that appears to be part of a link farm. The primary redirector URL is https://ttraff.ru/pify?keyword=%25C3%25A9nergies+renouvelables+pdf, which likely leads to the download of further malicious content. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=%25C3%25A9nergies+renouvelables+pdf In PDF document text
    • http://files.geras.sk/uploads/1/3/0/7/130739117/sadafagof-gewuba.pdfIn PDF document text
    • http://files.maineeastlibrary.com/uploads/1/3/1/8/131872032/maruvipep.pdfIn PDF document text
    • http://files.thechurchtaxexpertsofamericallc.com/uploads/1/3/2/6/132682327/76355.pdfIn PDF document text
    • http://files.sjcnl.ca/uploads/1/3/2/6/132681303/pisoropole.pdfIn PDF document text
    • http://files.luismojica.com/uploads/1/3/1/6/131606803/difowamabitukibe.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/1/0435/5158/8507/files/bazamexisowusipabidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/3354680371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/sound_of_silence_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/69733418300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/zumotedikokeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5467/6645/files/ps3_controller_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/41289693502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3799/0818/files/94237684606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/wuzokemuxesoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/67923410868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/stellaris_name_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.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_off00006eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 5388 bytes
SHA-256: 64e4b1c7dd988a663df52e45a76db293f2be979eeb2d2f17866a85a73013a516
font_01_sfnt_off0000815a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815A 12168 bytes
SHA-256: 665764cda919dc725b851efaf653628afb0b4b9a4ab9266c797e1b8b164d101e