Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdda40b3d1c22207…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 14:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dc1ab1b1010c6c11bc958aae4578d78 SHA-1: 9b3c3ec21588a558f261239bacf4f920f1594739 SHA-256: cdda40b3d1c222071f8a78c5d2ecc863c877aa37d81724ddbfdfeca8970d1dbd
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique used to distribute malicious content. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious redirection attempt. No scripts were extracted from this sample.

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/wb?keyword=ielts%20cue%20cards%20pdf In PDF document text
    • http://files.epictheatrearts.com/uploads/1/3/2/7/132711983/1195739.pdfIn PDF document text
    • http://files.anpslibrary.com/uploads/1/3/2/7/132740214/naxidamewosowuvogu.pdfIn PDF document text
    • http://kowidi.classnelson.com/uploads/1/3/1/6/131606056/8dab5186a44ff8.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/1/0440/4166/6710/files/73271895032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/5375555206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/73115490924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/nonolivuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/27798947439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/jet_engine_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/72406171571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/kekozurofadeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/brain_on_fire_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/37756934466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/tarilanepukilunaferaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kitona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/61208752863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4862/3510/files/sesirijewi.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 1

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_off00006a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5088 bytes
SHA-256: 1d236ba46df47d52c23430be25ea333cfa9973ed0cfdc56f68e45e5eea19ad5c
font_01_sfnt_off00007ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 9924 bytes
SHA-256: b8cd7fe465bca8e9ce0750dc899c0e9472f6b6e6a285be3eac4124b0779bd422

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