Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a81507a6689aecc…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 15:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0da9a11ccbba153f6cb26752d4cba55c SHA-1: 83383b552c9fb075ebfe4883bb2bf056dc95759f SHA-256: 4a81507a6689aecc06bbbe4ccd3b19ca81156560cd7188c38d5b89d2d40ff32d
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous links to other PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=delete+specific+cookies+chrome+android', is identified as a malicious redirector. The document's primary purpose appears to be directing users to potentially harmful external content through this network of links.

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=delete+specific+cookies+chrome+android In PDF document text
    • http://files.villanovancaastudentchallenge.com/uploads/1/3/2/6/132680813/7783020.pdfIn PDF document text
    • http://files.festivalrun.com/uploads/1/3/1/4/131438418/durisali.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/1/0437/7346/0641/files/9800242408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/67415003692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6316/4580/files/worirawigisezawuras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/amazing_grace_chords_in_g_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/56710868165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/56220972406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/criminal_law_books_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/algebra_and_trigonometry_textbook_mcdougal_littell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/wowagiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/73433291188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/73464060873.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_off00006215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 5456 bytes
SHA-256: de773d0f82ff12bc1df00f64e3c3c93da6f927f8eabcf4086bdd295f8b323480
font_01_sfnt_off00007479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 10352 bytes
SHA-256: 8064da9ae5f98a3a6d57202c6801c95fc6a8a9d4c1077f3087bd0392964bf12f

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