Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ce8839555c8b97…

MALICIOUS

PDF

37.5 KB Created: 2020-08-05 15:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d71090bebc99ee64998a6cfa0d4cb553 SHA-1: a462b7f78c6a154dcbe4533aca7b7b80725ee6e7 SHA-256: 72ce8839555c8b9704d59ff1def8df8f6bf84916cdbf6f861036c89b915a94f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to direct users to malicious redirector infrastructure, specifically identified as 'ttraff.ru'. The document body, though heavily obfuscated, contains the primary redirector URL and a large number of other URLs that appear to be part of an SEO link farm, likely intended to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector confirms a high likelihood of 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.ru/wb?keyword=earworms%20portuguese%20pdf In PDF document text
    • http://files.intrepidresearch.org/uploads/1/3/2/6/132682070/255424.pdfIn PDF document text
    • http://files.kyletheinspirer.com/uploads/1/3/1/4/131406403/a1268db72.pdfIn PDF document text
    • http://files.richardwilliamsvideos.com/uploads/1/3/0/8/130873822/5090814.pdfIn PDF document text
    • http://files.tinalouisecalidancecostumes.com/uploads/1/3/1/8/131857120/d80e513a68b0.pdfIn PDF document text
    • http://files.volunteercentermchenrycounty.org/uploads/1/3/1/4/131455463/vakigolefefiku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/adolescent_health_services.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/xalupowobajozewet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/96152302264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/mbbs_1st_year_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/20603072453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/warugedoriso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/hollywood_movies_telugu_dubbed_free_download_avi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/runeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/sidupemasazasogulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/94588011652.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47FE 5108 bytes
SHA-256: 6afe74c8b2a912de8644c907df8d21ca220b41982e7d9f8b6629f83330202849
font_01_sfnt_off00005978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5978 9788 bytes
SHA-256: 52e2b2a53098386ad903c9f434e378205549fc205136e846c0211d058910964e
font_02_sfnt_off00007ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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