Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66f9c62edaa2a6c…

MALICIOUS

PDF

47.5 KB Created: 2020-08-11 15:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54e2610a16e456d7e01dc9eabfba3eac SHA-1: 3944a08cba656b33cbe05dae7773e53dd3b0dae7 SHA-256: c66f9c62edaa2a6c2d86f23c1cb540220d1d19775d5e4cc6715c2c5d9c67b0e7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body is heavily obfuscated and contains a URL that appears to be part of a link farm or SEO manipulation scheme. The primary intent seems to be to lure users to malicious or deceptive websites through the numerous 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.ru/pify?keyword=simple+regression+analysis+example+pdf In PDF document text
    • http://files.niagaracentrendp.ca/uploads/1/3/0/7/130776518/xumori.pdfIn PDF document text
    • http://files.hope.cr/uploads/1/3/1/3/131381706/9337376.pdfIn PDF document text
    • http://files.michellesjohnson.com/uploads/1/3/2/6/132695546/6366908.pdfIn PDF document text
    • http://files.palabrerapress.com/uploads/1/3/0/8/130874433/d4308cb5d7685da.pdfIn PDF document text
    • http://files.kennetheugenepeters.com/uploads/1/3/0/8/130874400/6959958.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/1/0430/6134/6466/files/77905288541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3398/4161/files/nolewafozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3093/7751/files/puwivuxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/bloodborne_bastard_of_loran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/ap_grama_sachivalayam_category_1_syllabus_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/damulibiwexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/leah_edelstein_keshet_mathematical_models_in_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/2130/8828/files/breadboard_how_to_use.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/mupilabodabezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/72754737369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/pearson_health_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 5632 bytes
SHA-256: d8fb13a55a8523b25191f84dd2fb622611c88ff393932f8c05bda1d36e57cd5a
font_01_sfnt_off00008bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 10832 bytes
SHA-256: 7fd8d8e6034254d739270dc791f6edd5fa65579d2368ad092edaa497582ddf4c

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