Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c43c56403e5b74…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 19:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21c4e4409b93aa02ac660eff996d3afe SHA-1: dfc02c7576b6510d0f431c541fe401ffbb995fef SHA-256: b6c43c56403e5b7441cdcff490278640aab750ae39b42f060ceb64eb31ad212f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=condolence+card+template, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to templates and the authoring application, suggesting a lure to disguise the malicious links.

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=condolence+card+template In PDF document text
    • http://files.springfieldrenaissanceschool.com/uploads/1/3/0/7/130740589/buvidigu-jezelelupa-zenafifeluja-mugasavadapojak.pdfIn PDF document text
    • http://zibere.tomdangofficial.com/uploads/1/3/0/8/130814328/7013699.pdfIn PDF document text
    • http://files.jacquelineaust.com/uploads/1/3/1/4/131437702/mivenup_zejejubidaturiz.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/1/0433/5822/4549/files/mofawamalopijowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/stardew_valley_crab_cakes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/autocad_2015_crack_version_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/2_row_planter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/1683048552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/bengali_cooking_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/30420802600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/metas_multiservices_manassas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5678/3772/files/xujojenen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/emmeline_pankhurst_freedom_or_death.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_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 4948 bytes
SHA-256: 4c893e7c7a00d4e94f834b4d1c01d32aa2add181eb279e7e96425efde77e2941
font_01_sfnt_off00007165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7165 9796 bytes
SHA-256: c3bdf383ff1728b0107d46951d96cb80f62584d67dacba70d6816b3ff2ec10ff

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