Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ac301be4027b1a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-18 21:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75a877c525cc0f577f8ffd5eac6dcefe SHA-1: bb1191b62c7519e58129891aa0af19ba30093f8f SHA-256: e4ac301be4027b1a86138237e456e55c90f8821828bc5ca67dad78cfba105d40
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large external PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=artr%25C3%25B3podos+definicion+pdf, which is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains metadata from wkhtmltopdf, indicating it was likely generated programmatically.

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=artr%25C3%25B3podos+definicion+pdf In PDF document text
    • http://files.kayandthechaos.com/uploads/1/3/1/3/131380754/f88329b.pdfIn PDF document text
    • http://pakav.westcountryhearthattack.com/uploads/1/3/2/6/132695535/warimogovokivuv_sowegabef_pobuvolo_bezuwudaj.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/1/0427/8163/8812/files/formato_de_certificado_medico_cruz_roja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/20164377480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/86970459281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/towovimejobinure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/dorinimojejekemakasun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/naxenifapusopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/42740436627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/74430891542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/xekabenosipixipawisajebep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/fufopipiwo.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 3

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_off000068f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5032 bytes
SHA-256: 50a56910e354bb5025f147d2416e90f659dcd0f1e542e2c0491488790ccc620a
font_01_sfnt_off000079eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 13200 bytes
SHA-256: 3cf2f33a457c2497bd810803095763193c2fe0f2de4007f324128b0ff63b16b6

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