Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a8d6b3799cd925…

MALICIOUS

PDF

34.0 KB Created: 2020-08-01 15:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74b08cc1e7e84fe9cab82bd2b43a9fdb SHA-1: cfc7330825d7bbf9c00523c89e713219407a1104 SHA-256: a4a8d6b3799cd92522b38d93af78e9360a03d54ebcd81458f06f725393e41957
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=cub+cadet+lt1050+manual In PDF document text
    • http://files.woodsrealtygrp.com/uploads/1/3/0/7/130739147/569a2408e.pdfIn PDF document text
    • http://files.mrobrien.net/uploads/1/3/1/4/131482916/vakok.pdfIn PDF document text
    • http://files.sokoyaprod.com/uploads/1/3/1/3/131379321/tonidadu.pdfIn PDF document text
    • http://files.dscollegeconsulting.com/uploads/1/3/1/8/131871585/pabub_fufalutu_vavubo.pdfIn PDF document text
    • http://files.womenwhowandertexas.com/uploads/1/3/2/7/132712373/tuniwoxajelak.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/1/0432/3504/9640/files/reweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/gawixux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/convert_mp4_to_wmv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/vowuselowekujogudos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/wabuvajet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/zudagomokudarise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/rorokunekepolovadilowam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/pejijogizafodurezex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/sixikadasawupinadufus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/85913529229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/34215078898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/xabolularaxa.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_off00004776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4776 5176 bytes
SHA-256: 464de685118fb7900ee34151513aa30db6e60d0b670ab0c2d679f657260ef04b
font_01_sfnt_off000058fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 9536 bytes
SHA-256: 646903a647b6c7a1981c986dff2c12046ba3ebd85c3089b260ca4ba9d1d55e1d

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