Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf95bb7fa4bfde29…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 17:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c11286752403fd348aecf60e743c7d2b SHA-1: 4198404ee5ddabcce7472634d35913a13cedbde4 SHA-256: cf95bb7fa4bfde2963aed2da2aa3f8e961b777935ccde729921fa6045ac60d5a
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Cat 2020 question paper pdf download' and the malicious URL itself, suggesting a lure to trick users into downloading potentially harmful content. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, further supporting the malicious intent.

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.com/pify?keyword=cat+2020+question+paper+pdf+download In PDF document text
    • http://files.frachetti.com/uploads/1/3/1/3/131380467/zufufaladiru-lafanujojoleto-wogoduganex.pdfIn PDF document text
    • http://files.anydogildorescue.org/uploads/1/3/1/3/131384300/lesodemodexag_woforad.pdfIn PDF document text
    • http://files.natashasteer.com/uploads/1/3/1/4/131437953/6248808.pdfIn PDF document text
    • http://files.lawrencevilleroofingco.com/uploads/1/3/0/8/130874299/fanogiribozidij-jalofuximip.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/1/0445/3544/7711/files/acidemias_organicas_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/zotupegosikejasemop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/90138643898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0792/9508/files/basic_accounting_interview_questions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/39561044324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/61011507415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/leaf_dragon_hide_rotmg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6570/4599/files/xogumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/xugizusofetusezuguxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/ragewafimatoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/doctor_strange_hd_online.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_off000069b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 5432 bytes
SHA-256: 0363f40fbc989536f71a764a5ca463f5e46d361624fe5b535a4e5a8f166716e8
font_01_sfnt_off00007c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C41 9828 bytes
SHA-256: ef9cbecfcb18c2cc297199b4deb22bb526c4d0d6cb6626f5ba8a3db5f78c0054

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