Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b8e32709e05b3f…

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 13:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18bcf1238799855d0316be5e00305596 SHA-1: 44f2e987ed1fb928e6d8bc1d2d1fe246aaea87e0 SHA-256: 82b8e32709e05b3fb2106571d690bc02e72f7de8c9b69a62a882a157a17c937e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains URLs that appear to be part of an SEO link farm designed to drive traffic to potentially malicious or phishing sites. The ML classifier strongly indicates maliciousness, supporting the conclusion that this file is part of a campaign to redirect users to harmful content.

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=kkk+and+the+kartilya+ng+katipunan+pdf In PDF document text
    • http://files.professorjedi.com/uploads/1/3/1/3/131379730/xesodexajuzenes.pdfIn PDF document text
    • http://files.packaginganddisplayusa.com/uploads/1/3/0/7/130738620/texenopoxegaga-manokedivupozi-viwopikupariz.pdfIn PDF document text
    • http://files.authorresourcecentre.com/uploads/1/3/0/8/130814466/tibezuruw_vugofunu_soweredofawin.pdfIn PDF document text
    • http://files.nothingpeak.com/uploads/1/3/0/7/130740141/1967482.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/1/0434/0717/9941/files/bugiganitoted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/dyson_dc17_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/47427065862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/62069998408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/calidad_de_vida_significado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/jupuwugipumezitas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/ravamixatexaburuganewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/pifedujubumonoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/evinrude_88_spl_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/ssh_x11_forwarding.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 2

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_off000068b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B3 5260 bytes
SHA-256: d5f51afef91209ddc69f85dd0e1606f52c81759c5fa1ac7cfff5b89d92b63481
font_01_sfnt_off00007a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A94 10112 bytes
SHA-256: a333ff383ef9da18b8b7efa5a45109a10178fbd1c54d11ee18ca910815582cfb

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