Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dc98ac3fefe9ba…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 21:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 943d8848242dbad217c364e1c208bbf4 SHA-1: a34bea53d05c61a7fb3b008e50844b305992efb9 SHA-256: d2dc98ac3fefe9bac3eb3c247c03e82b7518782465ed0c0c5d6d8239e849b4b3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=modelo+biopsicosocial+definicion+pdf', which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to a link farm tactic. No scripts were extracted from this sample.

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=modelo+biopsicosocial+definicion+pdf In PDF document text
    • http://files.creativesimone.com/uploads/1/3/1/8/131858045/9256059.pdfIn PDF document text
    • http://files.ravensrelics.com/uploads/1/3/1/3/131398547/kedadubowegikiz.pdfIn PDF document text
    • http://files.miniaturesbygarcia.com/uploads/1/3/1/6/131636914/818241.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/1/0434/1330/7541/files/21415596646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/zipopijunapoviruxoxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/farepojigefikovixowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65028435792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/16771887446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/change_file_size_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/kotor_2_restored_content_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/mujekume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/kunafasadosizerowojepemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/72689170090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/82640841148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/332086006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/3195384275.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 3

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_off000065cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 5200 bytes
SHA-256: a71bd43038de1e1cb8b6335ac53c8b56b61e26b683142f4bc7c3ce796e7315b9
font_01_sfnt_off0000779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 9764 bytes
SHA-256: b9c1a56f486c7af682d8951823b50873c13211930480affd3caf0a7f3ba18b40

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