Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b439e05cdcd205b…

MALICIOUS

PDF

41.1 KB Created: 2020-08-12 00:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c685e67c467ac18d653bd889b490c1b SHA-1: bc0c4e9fd507c65f82cbce49dea7180926a6549e SHA-256: 3b439e05cdcd205b46e4fc80631438cf4f4c58a7cf3bc5eb6ef9ff2057293536
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, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body text, though partially corrupted, contains a string that appears to be a lure for a 'ccna cyber ops study guide pdf free download', suggesting a phishing or scam attempt. The presence of numerous links, including the malicious redirector, indicates a coordinated effort to drive traffic to potentially harmful sites.

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=ccna+cyber+ops+study+guide+pdf+free+download In PDF document text
    • http://jukeg.hayslandsurveyor.com/uploads/1/3/0/8/130814515/2718062.pdfIn PDF document text
    • http://files.phmiinfo.org/uploads/1/3/0/7/130739204/zudiji_paxizixem_zebajuti.pdfIn PDF document text
    • http://files.muralfx.com/uploads/1/3/2/6/132681690/f38caf68da8fbb0.pdfIn PDF document text
    • http://tufodade.calwhales.org/uploads/1/3/1/8/131856161/66140.pdfIn PDF document text
    • http://wolitami.joereneequest.com/uploads/1/3/1/6/131606289/zubutazemupakes.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/1/0430/3293/6605/files/zironojowobufagimojuxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2385/8845/files/94990937686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/angola_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/tunexukosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/agriculture_upsc_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/fuzibogugoduxosogetuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/zutusofaluzox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/navorinubuwebelaravezatur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/89518306040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/balancing_equations_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7291/6373/files/north_america_map_with_cities.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_off000059ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AD 5560 bytes
SHA-256: 05d15b0aee93e1f157e3a7126bddb312af7fba41226e776d19850849a2b064d1
font_01_sfnt_off00006cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 13408 bytes
SHA-256: 7570804cca525d6f498b2c94f96609d0da5c0876156d3aec140c97e39d8c678e

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