Malicious PDF — malware analysis report

Static analysis result for SHA-256 668aacd88df07277…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 15:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b68e80160d40c5f80ffcc04a36ebd9da SHA-1: 54c18633aa3f3ad18f0ae6a859aadf8001a8223e SHA-256: 668aacd88df0727705e0a3e24d7f07a74bccd669ce4bbf401cafca6b128818c1
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as free downloads, but they redirect to malicious infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=design+patterns+in+javascript+udemy+free, which is flagged as malicious. The document body itself is heavily obfuscated but contains references to the redirector and benign-looking Shopify links, likely to create a link farm for SEO manipulation and to disguise the malicious intent. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or scam attempt.

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.cc/pify?keyword=design+patterns+in+javascript+udemy+free In PDF document text
    • http://files.thebeveragebutler.com/uploads/1/3/2/7/132740997/tigarukoveb-faxamubit-burugapeke.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/1/0430/8949/4177/files/3907085178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4728/1062/files/cbt_for_anxiety_disorders_a_practitioner_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/optical_isomerism_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/almagestum_novum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/ergonomic_chair_design_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/carbimazole_mechanism_of_action.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/zokuvezawonulafomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/xifegarimusudilere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/31688241993.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_off00005e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 5680 bytes
SHA-256: f5f49371aab00b9b69716e451521cc7aa99462239efc338136ed2b28ac8237ab
font_01_sfnt_off000071dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 10120 bytes
SHA-256: c255f379eb0258ebbf02f07ee21b744790e1d513847fea6a50b0836938a2fe31

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