Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66c859a93224b67…

MALICIOUS

PDF

69.6 KB Created: 2020-08-09 05:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8da3942ea063e33c3920bac47770c709 SHA-1: 713bddf075d72cea5444d4c27e4e5ec01300fe26 SHA-256: a66c859a93224b67352b4368c74edbead4e930955e39e3a2a719cc76aa3f3b33
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains the text 'Walter raleigh history of the world pdf' and the malicious URL, suggesting a lure to download a fake historical document. The heuristic firings confirm the presence of malicious redirector links and a 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=walter+raleigh+history+of+the+world+pdf In PDF document text
    • http://files.kangaroohavenwildliferescue.com.au/uploads/1/3/0/8/130814397/soxavebis.pdfIn PDF document text
    • http://files.lonelymountainfilms.com/uploads/1/3/1/4/131438541/1c936c2f04f95.pdfIn PDF document text
    • http://files.authormlhamilton.net/uploads/1/3/0/7/130739814/d2a1d5f75c.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/1/0428/8030/3267/files/kurokebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/gawafunimijuser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/64911380200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/simple_algebraic_fractions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/2333714411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7994/8705/files/xolanilezigevino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/gixaboxijumugele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/34286032248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/xuwafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/18896261344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/kajab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/tigebumawatilesopika.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 7

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_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 5508 bytes
SHA-256: ca88f66ce38951371fc9b4b2765dbe3ed1999f099f37ebe5b35244d862c6287a
font_01_sfnt_off0000e3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 11008 bytes
SHA-256: 3013448cbd0ba4643e50a5e169b79f7ffd9ab7877d59443186734d694ba65f26

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