Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d18aec91ce27a6…

MALICIOUS

PDF

48.7 KB Created: 2020-08-05 14:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cae7a87d42364e3b040cdcb36faa6f2f SHA-1: f55924867d64f51de60409170d80291fb06d0675 SHA-256: 74d18aec91ce27a682b47789681c68a4db86da762689cd80f93a6c04129772de
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirectors. The primary redirector URL, 'https://ttraff.cc/pify?keyword=anatomia+y+fisiologia+del+pancreas+endocrino+pdf', suggests a lure for free document downloads, a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to redirect users to potentially harmful 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.cc/pify?keyword=anatomia+y+fisiologia+del+pancreas+endocrino+pdf In PDF document text
    • http://dakidixu.virtualshow.org/uploads/1/3/1/3/131383657/e928ad61.pdfIn PDF document text
    • http://files.ennisexterminating.com/uploads/1/3/1/8/131856247/supulel_wezodojudexir_pujus.pdfIn PDF document text
    • http://files.professorcrain.org/uploads/1/3/1/4/131483830/jagoliliro-wewapujubir.pdfIn PDF document text
    • http://files.northeastisc.com/uploads/1/3/0/7/130740442/4720902.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/1/0427/9956/2911/files/20018189318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/32865269006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/duwugupefivov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/sajutajiburejeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/husqvarna_240_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/38190215666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/jivuduzapidesajugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/2nd_conditional_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/11021227455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.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 2

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_off00007c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7E 5564 bytes
SHA-256: 5973c2c3b8e733880371368b4b32c63576331a27c31d33ce415cffc0129caf88
font_01_sfnt_off00008f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6B 11448 bytes
SHA-256: df7da22e0197c82aeba515ac4a230b3cad8a2afd3e53bba17533f0b8103b4b72

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