Malicious PDF — malware analysis report

Static analysis result for SHA-256 d661e0009bcd719a…

MALICIOUS

PDF

47.6 KB Created: 2020-08-17 15:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8eb67e902b66d6f07a61b46af77879cc SHA-1: 1408d8207d1c4e797a0a058a916d1cb73203b4e8 SHA-256: d661e0009bcd719ac22d969001d258f8471b960f1b5fc2499c19127240d02433
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=where+is+apical+meristem+found+short+answer', which is also flagged as malicious. This indicates a likely attempt to redirect the user to a malicious site for further compromise.

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=where+is+apical+meristem+found+short+answer In PDF document text
    • http://kiteg.ferme-luciole-farm.ca/uploads/1/3/0/7/130776340/8102421.pdfIn PDF document text
    • http://files.bowlssouthampton.org.uk/uploads/1/3/0/7/130775916/2bc85.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/1/0431/9176/3105/files/estructura_de_un_articulo_de_opinion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/2017_cadillac_ct6_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/pimumemeletaketen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/uses_of_actinides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/39259896015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2786/files/temaretesatudunojiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/jquery_get_selected_option_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/pavesajozadif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/73627669371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/muvabaluronej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/darexoxerolen.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 1

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_off00007cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 5500 bytes
SHA-256: 6a0682ffe98df0d1cc06071f8a7e65e52ce12b0ef3f3aa89a429dc7c745a82f9
font_01_sfnt_off00008f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7D 9840 bytes
SHA-256: f712d66a308c2ca8024f0cbbb461c53d19714ab178dd49f1460934de9a881f5b

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