Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b58f4360e6d96a3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 20:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d0aff3c46685de08cbc76bf69d3caa0 SHA-1: 1e824a5609c3a2c6e6679e595ef9fb6b29e875fc SHA-256: 1b58f4360e6d96a367d6399cef6930672f5d37ee9e7feaa0e32b8f1142b79a82
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=centrales+electricas+en+argentina+pdf, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download or view malicious content.

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.ru/pify?keyword=centrales+electricas+en+argentina+pdf In PDF document text
    • http://files.coryskurdal.com/uploads/1/3/2/7/132712508/abf383def.pdfIn PDF document text
    • http://files.linencanvaspaper.com/uploads/1/3/0/7/130739234/sigafofukireziv-zilaxo-zogavokugadejir-jokaso.pdfIn PDF document text
    • http://files.determinedtolearn.net/uploads/1/3/0/7/130738622/d0ec0ccd5dc9ff.pdfIn PDF document text
    • http://files.eastkentclassicmotorcycleclub.co.uk/uploads/1/3/2/6/132681342/2212548.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/1/0427/9166/5830/files/89442842835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/deploy_personal_website_on_heroku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/5389971631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/fijodeririboba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/linked_list_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/sijaxuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/netuxujukinofedizekonid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/safiled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/79044293697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/vagelirezofoz.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_off00005d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 5228 bytes
SHA-256: 93234041cc41b300506cf03c1b27aa892d08f8de69ff86e79b8e593805bab967
font_01_sfnt_off00006f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 11440 bytes
SHA-256: 009edbb270560a87547a593a46599c7ebebb16db3b45c7685cdd10e08c7e6adb

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