Malicious PDF — malware analysis report

Static analysis result for SHA-256 df87fcb4d91b343d…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 06:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e9a34bd3625240b4d980c3b01b67a78e SHA-1: 7a2acf5327c397d3b2020f035a1544e8fecf2559 SHA-256: df87fcb4d91b343d4c847aedbf4ed39a7f3590d57b52d57ba0b2bf4fcd84e6b8
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to 'gestion de la calidad total'. The ML classifier strongly indicates maliciousness, supporting the attack pattern of redirecting users to malicious infrastructure.

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=gestion+de+la+calidad+total+lluis+cuatrecasas+pdf In PDF document text
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdfIn PDF document text
    • http://files.hramusicwest.org/uploads/1/3/1/6/131606984/1103597.pdfIn PDF document text
    • http://files.laseraccents.com/uploads/1/3/2/8/132814552/firizuvija_sixuvekemot_sivetiv_wiluzulibenub.pdfIn PDF document text
    • http://files.visionworksmultimedia.com/uploads/1/3/0/8/130813458/pujote.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/1/0430/0449/3987/files/porafolonilanise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/anti_inflammatory_herbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8089/0008/files/neratopipibewumaxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9442/3192/files/mobis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/1004/files/66437366080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/muvetaxasoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/27979419263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/lonedosidexiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/anna_karenina_magyarul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/40233366544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/14461263493.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 8

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_off00004662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4662 5180 bytes
SHA-256: b3b4fd95907cef20e7f13c2a68d7d1ecf95ee2c8c41d032fb4b16f56dfa45ae1
font_01_sfnt_off00005816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5816 10148 bytes
SHA-256: b554211acb3fc7e0b281fce4200504a36ed3d02cee7c316cbd439e660ae69caa

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