Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e66959675e9cdb…

MALICIOUS

PDF

37.9 KB Created: 2020-08-23 17:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80542060511bdee747ae92ccb29999b0 SHA-1: 9572ccc21c935b3ce5f08e51bd47f52a4b430ff1 SHA-256: d8e66959675e9cdb1e62f2cdcf1f8d20d2a298920ba43b6ebac3ba32bdb2b0af
194 Risk Score

Malware Insights

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

The PDF file contains a link disguised as an 'Auxiliary boiler manual' that redirects to a malicious URL (https://ttraff.cc/pify?keyword=auxiliary+boiler+manual). This indicates a social engineering attempt to trick the user into visiting a potentially harmful site. The file also contains a large number of external PDF links, many of which point to potentially malicious or unknown domains, suggesting a link farm or redirection strategy.

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/pify?keyword=auxiliary+boiler+manual In PDF document text
    • http://vuroluzef.rudysdogpark.org/uploads/1/3/0/8/130874232/ff0e0129bb33.pdfIn PDF document text
    • http://jupefusa.dphsart.org/uploads/1/3/0/7/130739344/9073402.pdfIn PDF document text
    • http://files.sophieduffy.com/uploads/1/3/1/3/131398145/2043551.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/1/0433/9610/4348/files/97548081223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/claudio_monteverdi_cantate_domino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/manivafadigile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7402/3577/files/cover_letter_for_job_application_email.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/46750726763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4031/6311/files/83916290639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5805/2763/files/bsp_party_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/xaxopubasulewoxeruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/81650348850.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 6

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_off0000594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 4952 bytes
SHA-256: 3681642a49015e47b51078cb5f470eb5c7c085251e6da344e298b1b654a1e49b
font_01_sfnt_off00006a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A16 9676 bytes
SHA-256: a5eb38572079ecb6cba55a472788a1098fc99033b896d8a6e898cbe6aa80c3c7

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