Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4851b8ba687c25…

MALICIOUS

PDF

40.6 KB Created: 2020-09-17 10:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d55d763a3c7fcba21ebce8472558e67 SHA-1: 174e4a09c1b2ae665d8da59dac0a94ab746bb2be SHA-256: 9a4851b8ba687c252869c9f0b8df0143b4da36ee873e590ffbc5da7698487744
184 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, which is presented as a download for 'Blue is the warmest color pdf free download'. The document body also contains this URL and numerous other links to PDF files hosted on various domains, indicating a link farm designed to attract traffic. These links likely lead to further malicious content or phishing attempts.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/wix?keyword=blue+is+the+warmest+color+pdf+free+download In PDF document text
    • http://vagurawu.dianedailydose.com/uploads/1/3/1/0/131071258/e2bb8df.pdfIn PDF document text
    • http://tugevab.carolinapowerlifting.com/uploads/1/3/1/4/131438282/pejeduperu.pdfIn PDF document text
    • http://files.americaimproving.com/uploads/1/3/0/7/130776611/15d3b7964508.pdfIn PDF document text
    • http://wixonub.kelownaquilts.com/uploads/1/3/1/4/131483112/felusid-jijimorovikose-xapobofusun-rixajamemotokaz.pdfIn PDF document text
    • http://files.planowestsoccer.org/uploads/1/3/1/8/131856492/nubow.pdfIn PDF document text
    • http://xokunema.hhsmusicboosters.com/uploads/1/3/0/9/130969335/xarinovebiku.pdfIn PDF document text
    • http://files.angelhairwiggallery.net/uploads/1/3/1/1/131163976/zefuxabetutuvod.pdfIn PDF document text
    • http://files.sharmelsdanceacademy.org/uploads/1/3/2/7/132711999/9878a701.pdfIn PDF document text
    • http://files.northwoodsyogaandwellness.com/uploads/1/3/1/6/131606111/88145ec65.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/1/0431/8114/6280/files/bekulewukupuxagifimoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/zomasobapitimositupudal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/wejad.pdfIn PDF document text
    • https://13af00cb-46a3-495a-b673-d2fa48206f6b.filesusr.com/ugd/0b1cf2_a050b8c374f64dc0a6d4a9d544278d24.pdf?index=trueIn PDF document text
    • https://bc0506f4-3393-4da9-861b-11bd7c52a2e0.filesusr.com/ugd/ffcbea_b63c4ef6aa7845f6b392f5ea3e739c3f.pdf?index=trueIn PDF document text
    • https://6dc10773-6666-4a86-9913-9c5df28304ef.filesusr.com/ugd/b73feb_75f566bc86f64f9abe70178feb625855.pdf?index=trueIn PDF document text
    • https://a396d42f-cb4e-4a2c-89f4-17d994967ef7.filesusr.com/ugd/50de67_7bbec5ba084f413f8cf5cf1de1c224b6.pdf?index=trueIn 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_off00005165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5165 5536 bytes
SHA-256: 229ec2973ef937220b6406aedd669c77b72f8bf9156f144e45632f6aeed6ddf9
font_01_sfnt_off00006425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 15296 bytes
SHA-256: 19e81063855baf045429fdaf6d8eec39fa40ea6575f3f3cf1c6b48ca0ccf444c

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