Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6ca7dfe39247cf…

MALICIOUS

PDF

36.3 KB Created: 2020-08-14 06:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68d0209807378ab3861f5ad8b2233fd6 SHA-1: 402102d4da92ed401af453d3ca626151242f086c SHA-256: fb6ca7dfe39247cf3bc35de1efeeafadc94025cc2a0a9ab2a26bf72d81fcd71b
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a service manual. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious destination. The primary malicious URL is https://ttraff.cc/wb?keyword=ir%201730%20service%20manual, which is the most critical IOC.

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/wb?keyword=ir%201730%20service%20manual In PDF document text
    • http://files.nooracademychicago.org/uploads/1/3/2/3/132303374/fb947db7e80f.pdfIn PDF document text
    • http://sonafete.recordfit.org/uploads/1/3/1/4/131452903/vuweleza-pubuzugeruwutek-sizevedido.pdfIn PDF document text
    • http://files.emilyrosenaturephoto.com/uploads/1/3/1/3/131379801/xidij.pdfIn PDF document text
    • http://files.englishservicesforscientists.com/uploads/1/3/2/3/132303269/3a6c72bb1c0.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/1/0435/1465/8980/files/the_celebrated_jumping_frog_of_calaveras_county_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/bully_scholarship_edition_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/36477967178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/62220681946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/zirolaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/cryogenic_engine_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/isocyanide_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/24659531917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/22804488813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/2017_indian_scout_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/71577442616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/ielts_academic_reading_full_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2635/7160/files/84380038243.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 6

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_off00005116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5116 5380 bytes
SHA-256: c2c86fa5e701c67fbd079ea6e6987da054822e8877ba14796948ff9bc2ac1f6a
font_01_sfnt_off0000634c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 9700 bytes
SHA-256: 7481f1e00fa3ef6921beff6eea353d068551d521c22721a9746f8e0316ba3710

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