Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7d5253ca6d6ac2…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 14:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57a40a2cdde060ab3bbf513530bbcbfe SHA-1: 119de39ef52c89987a343eab1aca2ff5421fdc7e SHA-256: 0b7d5253ca6d6ac2074e95eae47e7ff28619c6e85f660b034440ae6ff4602e9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting an attempt to trick users into downloading malicious content. The ML classifier also strongly indicated maliciousness.

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=livros+auto+estima+pdf In PDF document text
    • http://xukojowid.adolfo.club/uploads/1/3/2/7/132710712/wixuxaj-ganidepi-madunawatikeki.pdfIn PDF document text
    • http://files.cmspso.com/uploads/1/3/1/1/131164117/litadalowaxenut-sebajabobo-bukomixaj.pdfIn PDF document text
    • http://gofodu.readingleaves.net/uploads/1/3/1/3/131398472/b921f7efdd4.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/1/0431/0522/2818/files/la_biblia_de_estudio_thompson_en.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/49560969261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4882/7040/files/25854664187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9553/1424/files/12335055966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/toyota_supplier_quality_assurance_manual_filetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/lipazipumomopipegutumilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/peneti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/basic_computer_knowledge_questions_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2657/files/36190225047.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 3

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_off00006e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E08 5156 bytes
SHA-256: ca828bf5b9a4767344dbf0052da3af12f9c6ec6b1769b7225dc25c0864268d54
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 2348 bytes
SHA-256: eb7635a770d59a2b8fbee1ed0afdc79e1b816ff311cf952ee24b523f04b24be2
font_02_sfnt_off00008a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A11 10592 bytes
SHA-256: e76405aaffa8b792f9c70aff863f8cf8f5674ee4cfbdc3cf2861bbaf1e05a276

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