Malicious PDF — malware analysis report

Static analysis result for SHA-256 debbd258df5fa01d…

MALICIOUS

PDF

37.7 KB Created: 2020-08-15 23:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20d1aede2d0b9b3995e1ccb26bae7ecf SHA-1: fbf877779b0b65a8d476564bc1ea9f7df7cf0847 SHA-256: debbd258df5fa01d95ba4d94d2099c18ae57b5d367a646a240645294780aea53
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to distribute further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests an attempt to manipulate search engine results or host malicious payloads.

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=sony%20mex-n4100bt%20car%20stereo%20with%20bluetooth%20manual In PDF document text
    • http://files.carouselmusictheater.org/uploads/1/3/2/6/132695832/3168216.pdfIn PDF document text
    • http://vusaj.stmwvenue.co.uk/uploads/1/3/1/0/131070767/e72bcf069f4.pdfIn PDF document text
    • http://gusol.bethefkingman.com/uploads/1/3/1/6/131637254/40a588b1.pdfIn PDF document text
    • http://nipolas.thinkfutureworkforce.com/uploads/1/3/0/7/130775507/vuwem.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/1/0432/5857/7056/files/fujobopazone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/77277604220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/jazz_ukulele_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/osu_skins_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/prostate_biopsy_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/18594800531.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_off00005337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5337 5856 bytes
SHA-256: 031b872febc1e252f687d55a7d5e570995a1e8a86f9391d3b49bde8d8afd4c12
font_01_sfnt_off00006719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 10268 bytes
SHA-256: 4655a3e17ff65e49c5185b9eca1359a1423b50bc37651e0fcc2df89c16a55004

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