Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e87a7e8f714b76…

MALICIOUS

PDF

41.0 KB Created: 2020-08-04 03:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: daaef51957ad190ec979189574353995 SHA-1: 46bdc13674be839047441631abcbae9b1cc0c084 SHA-256: 98e87a7e8f714b76397b6b01e9dbb408db60ef5459e0bb33683b97412fe67a17
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector. The document body, though partially corrupted, contains text related to an 'auditoria interna' checklist and the malicious URL, suggesting a lure to download further content. The ML classifier strongly flagged this PDF as malicious.

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=check+list+auditoria+interna+iso+9001+vers%25C3%25A3o+2020+pdf In PDF document text
    • http://files.nanonore.com/uploads/1/3/1/4/131438823/monanazupinul_gevomomulino_jonujowikiduje.pdfIn PDF document text
    • http://files.georgeinformationaltechnology.com/uploads/1/3/1/4/131437484/vojow-sidemumiz-pewefedugak.pdfIn PDF document text
    • http://files.thebackpackleague.com/uploads/1/3/1/4/131453193/2212322.pdfIn PDF document text
    • http://files.morrinsvillecountrymusic.com/uploads/1/3/1/4/131437457/xewevum.pdfIn PDF document text
    • http://lenajo.sheltersharesocal.org/uploads/1/3/2/7/132741099/xeraniwuki.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/1/0434/7274/8710/files/dodugebanobulajijakar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/24891157167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/tarojibukowefik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/18282563783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7132/1752/files/5736201291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/46906133377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/39173961980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/2942130005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/bujadugetugema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/xedofinaxizeto.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 7

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_off00005e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 6072 bytes
SHA-256: 51992329a3bbf6e68b7023db6948937175fc75fd595fffee4ce4a2c36a05dc0d
font_01_sfnt_off00007292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 9968 bytes
SHA-256: e20af2212237d07663fce6643f94d00e4bac5f0b94b6d7ab36c42276373f4d45

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