Malicious PDF — malware analysis report

Static analysis result for SHA-256 8290306b2753a8e1…

MALICIOUS

PDF

46.8 KB Created: 2020-08-09 13:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8732bbb27e6042e67a9bff91a623e223 SHA-1: db1db938e5c5fc307bf66dbd8d134217058c84f0 SHA-256: 8290306b2753a8e1e3c815ee547367d5ac0a284feb9e29ceadc40c0459ca5e2a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector at ttraff.ru, disguised as a document about decision trees. This indicates a phishing or scam attempt, likely using the embedded links to lead users to malicious content. The ML classifier also 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.ru/pify?keyword=metodo+de+arbol+de+decisiones+pdf In PDF document text
    • http://files.fifthelementdefense.com/uploads/1/3/1/0/131071256/pejemoxotikamu_fopekonogasoko.pdfIn PDF document text
    • http://files.backtobal.com/uploads/1/3/1/6/131606261/zazavunexo_wezuxukadunip.pdfIn PDF document text
    • http://sozegol.cozycamperrentals.com/uploads/1/3/1/0/131070374/2571696.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/tofidefunamigudevizuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/wejanomijugibebipubenexor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/mifovovidolatanimijeraruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/kalufiludi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/62615607961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/zuvogofaputevixigebugeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/naray_information_communication_enterprise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0674/6011/files/technical_analysis_for_the_trading_professional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/76493885476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8852/8035/files/addison_disease_article.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6752 5080 bytes
SHA-256: 7352ba8d67d1957de0409e3cdce0a02a894f5ce3942143c5546f927234908544
font_01_sfnt_off000078a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 11724 bytes
SHA-256: 011f36b34162acf49215c6744e8559242cb155bd952c367b9c9a37aebd8b94c6
font_02_sfnt_off00009eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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