Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d545ae94d1e278d…

MALICIOUS

PDF

48.3 KB Created: 2020-08-22 23:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef4032666a1736e3084a4c28272ec1d SHA-1: 264e3605208a478b14c8d1bd866a6af8e1268a3b SHA-256: 4d545ae94d1e278d47e13db0e578e5aed9f18d79c53ee16f1a58fdd58b36ee8a
202 Risk Score

Malware Insights

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

The PDF contains a call-to-action button and embeds numerous links, many of which are hosted on Shopify but point to various PDF files. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is used in conjunction with a lure for a 'Kumon reading level c2 answer book'. This suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=kumon+reading+level+c2+answer+book In PDF document text
    • http://files.designhireenjoy.com.au/uploads/1/3/0/8/130814205/ramub-zirural.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/1/0433/4292/1886/files/4187366762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/tawoxafuvifisukane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/72502350716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/17366798573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/cookie_clicker_clicker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0133/1364/files/lufibamalopibululaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/centrelink_aged_care_assets_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/wedding_march_piano_download.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 2

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_off000077a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A4 5716 bytes
SHA-256: fd7133ace3bde47ad7e5c68233e5e4d5783ae8c224b8888ff526958793ff897a
font_01_sfnt_off00008b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B10 13328 bytes
SHA-256: b36e4d639f9e777e704b8e059525c67f1a657350aaf156967d13fe83eebb31bf

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