Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76da9a7247aa622…

MALICIOUS

PDF

35.7 KB Created: 2020-07-31 04:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8dfc959702ce10e6742b9bac708fac2d SHA-1: 8173d7d94d94ef197c060f3da0b7ed27edfedcaa SHA-256: b76da9a7247aa6221136f9c8a0a180d4f3b38117fc9cffc582c29388237b6735
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a title about 'Hernia diafragmatica en gatos pdf', suggesting a lure. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, aiming to drive traffic to potentially harmful sites.

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=hernia+diafragmatica+en+gatos+pdf In PDF document text
    • http://files.lightpathdiscoverycenter.com/uploads/1/3/0/8/130874109/buvipowisarego.pdfIn PDF document text
    • http://files.sacredsantafe.org/uploads/1/3/1/1/131164383/jowoj.pdfIn PDF document text
    • http://files.lean-six-sigma-od-training.com/uploads/1/3/1/1/131164250/0bc3b6844be985.pdfIn PDF document text
    • http://files.realmofricketts.com/uploads/1/3/1/8/131856543/jogemo_lipasaxularikon.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/1/0438/3296/7318/files/22838830227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/16509497404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/gezogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/bivuzami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/xapogogizafunavolam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/fifodesuwulogojas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/jubisexeket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/32474024842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/bepudixaxoburogamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/funotixelevewavojebojaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/wetajigewugixob.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
🗂 Part of campaign: emmapickettbreastfeedingsupport.com 5 samples

Related samples 3

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_off0000524f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524F 5192 bytes
SHA-256: 74f6528d7b5b7eec7d456c27562b5bc7dc9d48eb8bba5d3f1b7c02f6834d1866
font_01_sfnt_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 8852 bytes
SHA-256: a5cc4c23201d9200bdc74c03583151c566b321650aaf87175e09762f16caf72a

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