Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69c8fa91ca58d37…

MALICIOUS

PDF

44.7 KB Created: 2020-08-15 14:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cda1ee841f9f3a61a71171abf5d7db30 SHA-1: 850725cfa8480cff678beddd1942e0c2f5e29e08 SHA-256: b69c8fa91ca58d37e1797533a1e1f373ab159bc5a9a106372e9a63d0dfaa6a3b
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with heuristics indicating a link farm and a critical finding of a redirect to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the primary attack vector appears to be the manipulation of search engine results or the delivery of users to malicious sites through a large number of outbound links.

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.cc/pify?keyword=inadvertent+disclosure+of+privileged+information+cases In PDF document text
    • http://burazuju.matthew517.org/uploads/1/3/0/9/130969204/pulajajosasa.pdfIn PDF document text
    • http://files.techmusings.me/uploads/1/3/1/4/131438389/duvugu.pdfIn PDF document text
    • http://files.greatautismresources.com/uploads/1/3/1/4/131453498/8595107.pdfIn PDF document text
    • http://files.resenviecon.org/uploads/1/3/2/7/132712050/kabut-xumodofiluduf.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/1/0438/5210/3842/files/biosensors_in_food_industry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/63528777145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2638/0960/files/java_tutorial_free_download_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/25903457836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/purotunoganer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/89103896615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/31155166019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/metabolic_flux_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/the_coding_manual_for_qualitative_researchers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/space_invaders_java_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/jugewimizebova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/95329186844.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 6

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_off00006fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 5472 bytes
SHA-256: 08cd7bb3f4852d81edeaadc3dc61078c7977b0f5ae403df27b85a15fc4cad76a
font_01_sfnt_off00008255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 10208 bytes
SHA-256: 279be1737a2f6ab598b6eb9ebb6a5f0f8ddb84cfe8d0d371cafea8b0372b594c

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