Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d5fb7ffab25000…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 13:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 723b6833af771a72e451fdbbc5edc545 SHA-1: 41ce6c8ea8a3c14c96a4dcbbd26a5b4b59508990 SHA-256: 98d5fb7ffab25000e691ef20795a537ff41a3ecf83e7336076425c0c9743d880
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure for a book download, likely to entice users to click the malicious link. The presence of a link farm heuristic further suggests an attempt to distribute malicious content through numerous external links.

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=livro+capit%25C3%25A3es+de+areia+pdf In PDF document text
    • http://files.dpjutzi.com/uploads/1/3/1/8/131859370/rozimopoxabipomo.pdfIn PDF document text
    • http://vedesaxen.vinified.co.uk/uploads/1/3/2/7/132712615/d7ded195c47fb.pdfIn PDF document text
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdfIn PDF document text
    • http://nazafizev.mandmbarkery.com/uploads/1/3/2/6/132695969/fb6a376710bacb.pdfIn PDF document text
    • http://files.refugeehighway.net/uploads/1/3/0/7/130740189/3580641.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/1/0431/1384/0793/files/55027898344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/urllib2_vs_urllib3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/47305440850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/68046084818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/42217738282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/36181339109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/51616070054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/41084962245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/gebibozuwigazixuvew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/cg_pet_answer_key_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/zevukenabexafej.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_off00006291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 5436 bytes
SHA-256: a39fbe168bee40059304a5b7c448080563ba660fda74b7eaed226a101d1a9bd2
font_01_sfnt_off0000748d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748D 12292 bytes
SHA-256: 9dd21c0ed4b4439f99ec1a67907c9c87d286332af3507b02f5031497e1453f99

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