Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdc4be3b6d9a79c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 02:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17fe4a14cb96476dbfd197305a463b0a SHA-1: e6af341aa13c71f13340418c36983cb0da176450 SHA-256: bfdc4be3b6d9a79c9d4798eed342c9add1536ec85e66684f5c9e8562c1a9aa99
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a printable agenda, which is a common lure for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate the presence of malicious redirector links and a link farm designed to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=agenda+2020+escolar+2020+para+imprimir+pdf.

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=agenda+2020+escolar+2020+para+imprimir+pdf In PDF document text
    • http://files.elkioskoboots.com/uploads/1/3/1/4/131437249/8777817.pdfIn PDF document text
    • http://gimuwesob.wouterbergenhuizen.com/uploads/1/3/1/4/131409090/rifovapo.pdfIn PDF document text
    • http://files.hollingertennis.net/uploads/1/3/0/7/130776401/xurosevodub-xifewu-tijebubewin.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/1/0429/0582/9532/files/22289404820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/bebiwivulekanavafuvomegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/67653479664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/tojuzilijaxazapazizuvofag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/suseresogovevafixevob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/dubotelagatuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/55983728335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/towugafomonamuvamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/walmart_cashier_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/69959918278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/45097833665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/goradarapazegi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 5740 bytes
SHA-256: 63fb8ac8ae826cbbdaab056ca3b0d77e5d2928c964771cd1532b9c2dc611cc0e
font_01_sfnt_off00007a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 11556 bytes
SHA-256: 7dba2bf788a26152dd8cce9630c18b72aa0137360117d5a4f578315eca29f953

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