Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f19f28e4257178…

MALICIOUS

PDF

65.9 KB Created: 2020-08-10 14:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1127ed6d6c60e2d8c360b8419ae3628 SHA-1: 2f69c947ba4cc72406d0de37cc233bd2f008cc93 SHA-256: 33f19f28e4257178f7ae10be59f6de1e12bd98a6363ef9aa4154a86d71b2a9c0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the file is part of a link farm or SEO poisoning campaign designed to trick users into downloading 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.cc/pify?keyword=aparato+digestivo+generalidades+pdf In PDF document text
    • http://files.fabuliciousteaching.com/uploads/1/3/0/7/130738534/rulujezajit_suretugu_nogigepevavapu.pdfIn PDF document text
    • http://files.arsfabricandi.com/uploads/1/3/1/3/131379680/bewobakonesidopa.pdfIn PDF document text
    • http://files.dynamicspinesportwellness.com/uploads/1/3/2/7/132712369/dawujov_wunufanuwamivuj_miduworut.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/1/0434/1065/3338/files/84419118522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/62423029682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/14705786923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bronchial_asthma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/6133717458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/soluciones_isotonicas_hipertonicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/68799412837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/zijulit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/astm_e8_standards_for_tensile_testing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/77611100633.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 5

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_off0000c1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AD 5256 bytes
SHA-256: c9bc9e0b28c91f5bf461a3efafa12ab354a414548126074149342a1dcf6cc3f4
font_01_sfnt_off0000d3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A8 11604 bytes
SHA-256: a2f724a59fe67fa95c61be95d4c108a830c92503f87d1483a45a99e03b04d2ee

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