Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dff56e53284bf29…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 11:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d26e51f73c3d1d583863a0b8a40dd776 SHA-1: ec4c28ee81c729ecc8b0f76778c6500ded1f33fc SHA-256: 5dff56e53284bf291919f579cc2657d543d67a16d156cce11eda5aa0da69f7f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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.com/pify?keyword=null%2527+s+brawl+stars++ios In PDF document text
    • http://jijad.nursegonestrong.com/uploads/1/3/1/6/131636665/wefenina-buxisowunafijop.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/1/0435/8746/9469/files/22865589440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/english_interview_conversation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4992/7075/files/98602647955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/pepibomixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/67625714685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/windsor_locks_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/atos_institucionais_ditadura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/96937170200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/mekezoseguzujajarugoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/animals_diseases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/motemadifex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/catalogue_oriflame.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 4912 bytes
SHA-256: 4c63891aba9ac1f881ed46249b4873cd625242ba633bef8761fd50218567449d
font_01_sfnt_off00007128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 11668 bytes
SHA-256: 7c46bc01d10a2124991c757c1da15e60ae110f7c3eefc3532dd31c2ca6cc09fc