Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3ec4261db24a28…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 03:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d21e0bcd0a6faa4cedd8559b9d8642d7 SHA-1: c287ba381bc24f5fbf8f32e358853aed549f5b79 SHA-256: ff3ec4261db24a2859bf43b66fb39b28f4d1291958741bc9b9a2d58921ca5378
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and heuristics suggest a lure for 'autotune pro free mac', likely a phishing or unwanted software download attempt. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm designed to obscure the malicious redirector.

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.com/pify?keyword=autotune+pro+free++mac In PDF document text
    • http://nepufo.lillyotasevic.ca/uploads/1/3/1/6/131606289/xusak.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/1/0431/5735/6695/files/basic_python_programs_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/dinorepumawugit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/20446652592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7985/files/obusforme_pillow_canadian_tire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/sazut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/riletudatukumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/urodynamics_made_easy_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/tamasha_full_movie_720p_filmyzilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/xifixuvavesomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/1165908086.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 4

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_off0000667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 4940 bytes
SHA-256: ac3d12e9b9ca97195e78a22876c1e9a1dec35c257efa8749432132a37c21204e
font_01_sfnt_off00007731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 10208 bytes
SHA-256: 71e2922e8ab939c4a84900c84cc08e8e596a871304be8e7edaba8fb656bb36fb

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