Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3d1ec916caa3be…

MALICIOUS

PDF

37.1 KB Created: 2020-08-23 02:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2123a08b2b0d14ed170dedc8fc7b9a6 SHA-1: 2e163a16bc9eb21cca3851a90cc49054244979ae SHA-256: 6f3d1ec916caa3be27d3f51ce7ee97feb2fb1e4104c22fe7bee08df55ff347fb
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at `ttraff.ru`. The document body, though heavily obfuscated, appears to mimic search results to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness, and the presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm used for SEO poisoning to drive traffic to the malicious redirector.

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=google+hangout+software+for+pc+free In PDF document text
    • http://sudasewog.ashequilters.org/uploads/1/3/1/8/131856257/ec0d0cd727c562d.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/1/0463/2241/7826/files/62561661956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/7457779925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/niwatojulazud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9829/2643/files/takudokanizijidufekezoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/vupefikidafatujif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/8810080318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/answering_kassandra_s_questions_ac_odyssey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9883/2037/files/learners_license_questions_and_answers_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/90544064610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/classification_of_organisms.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_off0000527d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527D 5400 bytes
SHA-256: 14ad766c721d9a850c914727706d032af6fe37b5359c26cb4c3a9dd61053b62b
font_01_sfnt_off000064ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 10192 bytes
SHA-256: f6225a700a5ea452e5edfd85e0140be7f61febda225c0aa84730c410f9bdbf72

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