Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b6df3c3229d2cc…

MALICIOUS

PDF

39.4 KB Created: 2020-08-20 03:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bda0f67b37455c2af62bfdc616c8ff20 SHA-1: 4155b65f0d9f4f82518570a7bd0de178e3da248b SHA-256: a5b6df3c3229d2cccb9bae7ec0a267a99df7ee54e63a3170830bc8b1f45ef955
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The document body contains obfuscated text and a URL that points to a known malicious redirector. The primary intent appears to be to lure the user to malicious infrastructure through a deceptive link farm.

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=contrast+conjunction+worksheet In PDF document text
    • http://ruxepokuk.threadsolelife.com/uploads/1/3/0/7/130776257/1739243.pdfIn PDF document text
    • http://files.azureskygifts.com/uploads/1/3/1/6/131607374/kozavusu.pdfIn PDF document text
    • http://files.indianasicklecell.org/uploads/1/3/1/4/131408364/vuniriwifotor.pdfIn PDF document text
    • http://files.rhythmsofawoman.com/uploads/1/3/1/8/131871625/poxexakoluwemamo.pdfIn PDF document text
    • http://files.narinesookram.com/uploads/1/3/1/4/131483584/xidenike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/mubuxeditajisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/11647000955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/munoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/guia_ada_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7009/4501/files/etymology_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/93735813645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6874/9979/files/38102516053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/67745850661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/phys_x_loader._dll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7483/7918/files/glencoe_health_answers_chapter_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/laxuzimiduvura.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5026 4992 bytes
SHA-256: d49883225b918106a187ef74ff188179c90bf687ae90540b9a18d6b18e6a73c7
font_01_sfnt_off0000612d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612D 9824 bytes
SHA-256: 9c4b4dd12d27c77b3097d3e665b84123941a039b17fb1daaac7942176b241d92
font_02_sfnt_off000082be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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