Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c68c27497918056…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 21:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c73d57bb4d5802e241874d31ebb2eafc SHA-1: 42fa2041bf85bdd5354b6288b86608ef50f6903a SHA-256: 4c68c27497918056cdb7abbe1329d5ad35d68ebe23000bfe9612a802a3121413
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This indicates a link farm strategy, likely intended to obscure the final malicious destination or to leverage SEO techniques for distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=job+analysis+meaning+pdf In PDF document text
    • http://ziwub.southbaywoodworkers.org/uploads/1/3/2/3/132303382/1164495.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/1/0435/8642/0893/files/vevasifudezunez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/medela_breast_pumps_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/article_370_in_gujarati_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/16443583448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5126/0836/files/check_in_southwest_flight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/aoac_official_methods_of_analysis_1984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/nutafilovomumovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/oracle_business_intelligence_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/demakulinupafax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/36651055949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.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_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 5496 bytes
SHA-256: c9042f6744fa7459c57df695490f63fd36b7108aa4bf62069ce9352086661560
font_01_sfnt_off00007ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 9644 bytes
SHA-256: bdee441ec5fcb58e8f5e86d5fabbaa4e48ee3f74f44a0f7af3530f00d8c6575d

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