Malicious PDF — malware analysis report

Static analysis result for SHA-256 3419cf08db85de88…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 01:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d4b65e2b88a21592b1df4791be8fb3e SHA-1: 262fae4ceb33b1c6435d0654257cb16e8c8992bf SHA-256: 3419cf08db85de88321989720985deaae5f555c897b33deb33c48da519560f64
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to redirectors and potentially malicious domains, suggesting an attempt to distribute further malware or phish for information. The presence of a link farm and SEO redirector indicates a tactic to obscure the final malicious destination and increase visibility. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/wb?keyword=philomena%20book%20pdf In PDF document text
    • http://files.russlevin.com/uploads/1/3/1/3/131378776/wifoliti.pdfIn PDF document text
    • http://dugoko.launidadlatina.net/uploads/1/3/1/3/131379290/5299579.pdfIn PDF document text
    • http://jisidesi.rhbconstructorainmobiliariasrl.com/uploads/1/3/1/3/131380429/gavefamemelazo.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/1/0428/3164/2780/files/rijimug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/8897519441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/bavijefaretefiriperep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/bulupakojevifepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/56345820192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7518/9401/files/cerere_inmatriculare_auto_bucuresti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/pdf_file_creator_software_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/rubajuwodoxidegore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/receipt_book_walmart.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 1

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_off000065f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 5212 bytes
SHA-256: 6a26f75369e3b13111d86364def3845a07809e5f7837ab72bf2dd0d528e07351
font_01_sfnt_off00007782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 10120 bytes
SHA-256: d778a3ee890b471bc8d200980088b32ead5aab4bd5a8a49de5429ac08a9534a3

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