Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3a3d953505ff2d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 19:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 451f688a452fd861698b7d9ce8303be6 SHA-1: ae6a50c6a434121c7cfd3c26ee05c41e90a5d340 SHA-256: 8c3a3d953505ff2dab7eb662681fec6790e4c3eda1c7e82ae92c65945ef7429b
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware distribution.

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=ukulele+capo+chart+pdf In PDF document text
    • http://files.vocarsonchurch.com/uploads/1/3/1/4/131437859/bujajonimodi.pdfIn PDF document text
    • http://files.lovebudskincare.com/uploads/1/3/0/9/130969458/34ac27c73.pdfIn PDF document text
    • http://zalamef.youngoakmorgan.com/uploads/1/3/0/7/130776225/4364145.pdfIn PDF document text
    • http://files.aceinthehand.com/uploads/1/3/0/7/130776542/4bce10dc.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/1/0431/4624/8358/files/pewolafiwibamafido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/dutadusavidovolisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/girezopamoziladoxuwilox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/emotional_abuse_in_marriage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/amortization_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/53770337732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/74499021422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6432/6309/files/dupoganuzupupizuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/emuparadise_workaround_script_not_working.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 5

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_off000062ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 5120 bytes
SHA-256: 1f899a8eb1c16465ee5bae5a4586e002f72cf8b3578381968de2b44adef20c17
font_01_sfnt_off00007453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 10632 bytes
SHA-256: d3a32a3069117dc0a95b90e06f36b7bb15e609fc491999d26d38a4c39d11e47b

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