Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15316842219c322…

MALICIOUS

PDF

48.9 KB Created: 2020-08-15 02:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 534f60a7b0ea49a86087cbe06b5b1067 SHA-1: f9aa99e6e417f9cd5c5cecc92465e502180e7b8f SHA-256: f15316842219c3225d16d4ac3da5b2db2976487a9585faec2ede783a2b94ee1d
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the text 'Certified network defender study material' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further supports the link farm heuristic.

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=certified+network+defender+study+material In PDF document text
    • http://files.dipconcaribbean.com/uploads/1/3/0/8/130814411/xulov-lekinosa-betaberijumi.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/1/0431/4251/2791/files/funixunalobowarow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/biblia_de_estudio_palabra_clave_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/lodagedevabuxafir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/butterflies_are_free_play_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/lowes_north_attleboro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/surprise_party_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4465/0651/files/gokobixanisituxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/60939812951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/tixirewojetewaliwesijezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/fasisijasorikoxas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/22802554333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/jobijavagiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/tarekobigol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/31086541669.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 4

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_off00007701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 5216 bytes
SHA-256: 83bfce402851dc6203808a3633105b70824bc7c55747a7d41d99b2581ac741a2
font_01_sfnt_off000088bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BF 14840 bytes
SHA-256: 0bbf59efce661e2b8f154e8ff3a01d40977560f8118534817f8584944e2c5ec9

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