Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c53152ff8330a2…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 16:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9e9f4f628c017e374dc45579b2104fd SHA-1: ea4ab15ddb14b3eed7cd817cc192c76456ab5dfe SHA-256: c3c53152ff8330a2a891d72a243fa50af40b4d7890b0582f58f3ff87ed1eb4b8
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'Psoriasis causas y tratamiento pdf' and references wkhtmltopdf, suggesting a lure to download further content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=psoriasis+causas+y+tratamiento+pdf In PDF document text
    • http://fariji.heathmereprimary.org/uploads/1/3/1/3/131379965/7f20f41271e33.pdfIn PDF document text
    • http://files.kennelgoldflames.com/uploads/1/3/0/8/130814169/fb29c97.pdfIn PDF document text
    • http://files.irr-f.org/uploads/1/3/0/7/130776714/468638.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/1/0434/5013/8784/files/wadozokikomexezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/75336270699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/campbell_biology_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/9167634266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/foweror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/daked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/manual_de_cooperativismo_y_economia_solidaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7680/6808/files/html_object_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.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 4

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_off00006ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 5372 bytes
SHA-256: a7b0a697e7416d0fae9825d02775516ab1fa42ed90bf168a3a524697f4239a17
font_01_sfnt_off0000810d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 11084 bytes
SHA-256: 65e14cb46bff33f29b4a4c109f32f6fbd2698abf1477bc09d7104a03d634bcba

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