Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b131a86b2d4d267…

MALICIOUS

PDF

36.9 KB Created: 2020-08-25 21:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8cff565f47e0cc243c303835bc355624 SHA-1: c1e7bd25a216f6499166a3925260f72fe4ab0e5f SHA-256: 0b131a86b2d4d267246de3814bfe45a0c501e84f95aa860fd39a40105f36a510
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which lead to redirector infrastructure, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ast%25C3%25A9rix+et+la+surprise+de+c%25C3%25A9sar+stre, which is associated with known malicious redirector activity.

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=ast%25C3%25A9rix+et+la+surprise+de+c%25C3%25A9sar+stre In PDF document text
    • http://nesasu.stpetelimoservice.com/uploads/1/3/0/8/130814681/mutexopajafopu.pdfIn PDF document text
    • http://files.claresouthworthflute.com/uploads/1/3/1/0/131069887/2410649.pdfIn PDF document text
    • http://jinuwuna.nysacanecorso.com/uploads/1/3/0/9/130969873/0eb25fab2121.pdfIn PDF document text
    • http://files.cheddarscbds.com/uploads/1/3/1/1/131163859/nixex.pdfIn PDF document text
    • http://tujusi.douglaspharmachems.com/uploads/1/3/2/6/132681352/5188991.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/1/0437/1329/8581/files/54635594402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/70554688408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/pamoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1869/4305/files/78442831891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/enboost_skyrim_se.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/kibanigufoluwuzeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9422/9406/files/61321801538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/honeywell_yj5900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/application_letter_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/bixulujum.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_off00004d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5C 5264 bytes
SHA-256: c93447022564b32642d839b9ef908ae8c66369d321e621cc704b304d3b255e60
font_01_sfnt_off00005f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 11616 bytes
SHA-256: e56ef561180557bbbcaeb0c7183f02937159a9fa011b0be36e8facc27d3ccb4e

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