Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb39d3bbb4befdda…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 23:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21b9d585ca841248a1d96a092bb0c1da SHA-1: 33520fb5103ef77ca4aadee789cd3c357518ac31 SHA-256: cb39d3bbb4befdda9f68381c6c6019916ae01bf8087a5fdb5b200391cfefe145
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service (ttraff.cc) and a large link farm hosted on Shopify. This indicates a phishing or SEO poisoning attack, aiming to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=biografia+de+alfred+russel+wallace+pdf In PDF document text
    • http://files.westtechmobile.ca/uploads/1/3/1/6/131637562/rapigew.pdfIn PDF document text
    • http://files.onceuponabus.com/uploads/1/3/1/0/131069860/kufuwibabomak.pdfIn PDF document text
    • http://files.gem-uk-properties.com/uploads/1/3/1/4/131453902/jarobefizojovit_zogibemakemix_jatutaxoka_fijonanax.pdfIn PDF document text
    • http://files.foreverhereforyou.com/uploads/1/3/0/9/130969166/tefurewemowef_tisawipafimubil_ledafitetujuxu.pdfIn PDF document text
    • http://files.sitatyourperilchairs.com/uploads/1/3/0/7/130776126/kopukuvusegit.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/1/0428/9665/4489/files/antecedentes_historicos_de_la_administracion_de_operaciones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/tulufudefopekalutanunot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/744681579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8634/7417/files/bible_in_english_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/panububuselanuxepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/autosys_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/35249422263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/witagavelozuvazuzuwusas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/17584231304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/78605916882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/40631508998.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 8

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_off0000716a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716A 5464 bytes
SHA-256: 3272549418b6f8fa51ad22bd0dea3eb2ad0559c32a6f330304f6dec3389bce39
font_01_sfnt_off0000842e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842E 10524 bytes
SHA-256: dfd0eedcfdd94bcb32aebab1262e3943bb940a394fe1153b1a3270d66d833532

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