Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3d0e163432bd2d…

MALICIOUS

PDF

48.9 KB Created: 2020-08-07 14:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e33b494515291a7dd1240f7aa5c8a927 SHA-1: a9fa8580a8e631c673579e60fe96b89d67ab9b83 SHA-256: bf3d0e163432bd2d55e1e8452e01478dff47331d31529be1ef474c15ff1bd0a4
194 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. One URL, 'https://ttraff.ru/pify?keyword=effects+of+air+pollution+on+plants+animals+and+humans+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same suspicious URL, suggesting a potential lure or redirection mechanism.

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=effects+of+air+pollution+on+plants+animals+and+humans+pdf In PDF document text
    • http://files.valentinesphotography.co.uk/uploads/1/3/1/0/131071164/5692276.pdfIn PDF document text
    • http://files.judyandjonathan.com/uploads/1/3/2/6/132681359/xelizi.pdfIn PDF document text
    • http://moduxe.rlasfoundation.org/uploads/1/3/0/7/130739678/f5ccb9e422.pdfIn PDF document text
    • http://files.clarevet.com/uploads/1/3/0/7/130738814/6baf8b64a8319.pdfIn PDF document text
    • http://toxufu.albertaatlatl.com/uploads/1/3/2/6/132681556/9710526.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/1/0431/4644/4960/files/foworazuromepaxejusat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/pafekabidotugame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/semi_modal_auxiliary_verbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/kovabug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/47206505242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/34425492035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/36583489164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/dededibeluraxuganij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/6107537055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5397/2630/files/25728977614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/70657543507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/86470094877.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_off0000817d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 5352 bytes
SHA-256: d16dd86e82fc1177a06b9af61cc597985291ce3ce4a587bc82f0af5c7ec345ca
font_01_sfnt_off0000938c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938C 10200 bytes
SHA-256: 5d9ba8d0eda71d949754c073d50c4dbf0783f6a978aa38759d1d5f0090c3b926

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