Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bf8b5dd2d4ef44…

MALICIOUS

PDF

50.9 KB Created: 2020-07-30 06:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b53ce90fcd000956cf70e20a2b73276f SHA-1: ac720df77216be0a3c1ecf69dd46d870f22c0bbe SHA-256: 82bf8b5dd2d4ef447b64f4d2f07e34696ab5253782f29d27042b3263bbd79b08
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links to external resources, including a known malicious redirector at 'ttraff.cc'. The document body, though partially corrupted, suggests a lure related to medical information, likely intended to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness, and the presence of embedded links points towards an attempt to redirect users to a potentially harmful site for phishing or malware delivery.

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/pify?keyword=diferen%25C3%25A7a+infec%25C3%25A7%25C3%25A3o+viral+e+bacteriana+pdf In PDF document text
    • http://files.mchsorchestra.com/uploads/1/3/1/6/131607110/4029818.pdfIn PDF document text
    • http://files.lauravallesconsulting.com/uploads/1/3/0/7/130776162/moguzemadur-vezozo.pdfIn PDF document text
    • http://files.rominaberenicecanet.com/uploads/1/3/0/8/130874241/916995.pdfIn PDF document text
    • http://files.eugeneatwoodfund.org/uploads/1/3/1/6/131637679/dewegiv-wizarozife-dukuwibupelari.pdfIn PDF document text
    • http://files.backcountryclassroom.net/uploads/1/3/2/6/132682989/nelinizupa.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/1/0430/5004/1495/files/duwifuwitaxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/zalijezepupikux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/vivakofexonapemalukepav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/27092690165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/46324679331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/89180441786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/poxesomolenosexazamov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/25655398717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/90112731850.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 8

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_off00007955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 5456 bytes
SHA-256: c1e4443e36176a365a06f724d6f3f9cc7034bd87defc267cc13c2e1a3d82355c
font_01_sfnt_off00008b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B11 17292 bytes
SHA-256: c2f1d2c3eae11143b8f6a7a28615113781b1c51676f5b0b895cb6bc2174e0ddb

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