Malicious PDF — malware analysis report

Static analysis result for SHA-256 164342ef7a35ce65…

MALICIOUS

PDF

51.4 KB Created: 2020-08-16 13:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f21cb803303faf1b5a68e099f34ddd76 SHA-1: d8a9c11cbe2b56f96c13e19c5bc544a825c35df9 SHA-256: 164342ef7a35ce65f364c6fbb690608c857c12423b9edcb2af3c54c9c891d225
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, likely as part of a phishing or scam campaign. The document body text and heuristics indicate a lure related to 'shirt size guide uk europe' which points to a deceptive social engineering tactic. The ML classifier strongly indicates maliciousness.

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=shirt+size+guide+uk+europe In PDF document text
    • http://files.krabidream.com/uploads/1/3/2/6/132681566/3285554.pdfIn PDF document text
    • http://xirenuxud.mrsregion.com/uploads/1/3/1/3/131380729/tinopedulazidad.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/1/0430/1167/0179/files/89277587847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/sowurukutorokalode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/edelbrock_1406_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2438/files/74700402521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/zazividobufenerobit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/joputokorufojuwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/vikabedugafarafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/70855653327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/bewovomidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3132/5846/files/20057833356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/tewekegeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/aristotle_politics_summary.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 8

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_off0000830e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 5196 bytes
SHA-256: 78e32b175cf1a2720e1f1a42299e13974ed89a0496fdad43831c3228dd0e856a
font_01_sfnt_off000094b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B8 14180 bytes
SHA-256: 40d46cf23a2858e7ad44fe05fda0ed173803913e7c00070593df573d890ed429

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