Malicious PDF — malware analysis report

Static analysis result for SHA-256 b124cc5662a4e316…

MALICIOUS

PDF

41.2 KB Created: 2020-09-12 08:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 046f1a5c29c325388bb4136383bfafe7 SHA-1: 135c92caac073859336c7d6fc2000f58e1f53880 SHA-256: b124cc5662a4e3160e3f5d0ab0d1263ee904876ea00d6ea932f7d1a3bad74288
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates a link to known malicious redirector infrastructure, and another identifies a mass external PDF link farm, suggesting a SEO poisoning or link farm attack. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the title 'Dodgers stadium food guide' and metadata indicating it was generated by wkhtmltopdf, likely as part of a campaign to drive traffic to malicious 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.ru/wix?keyword=dodgers+stadium+food+guide In PDF document text
    • http://files.rileystevens.org/uploads/1/3/0/7/130738850/025ce1.pdfIn PDF document text
    • http://files.olivewavz.com/uploads/1/3/0/8/130873877/gixosupotuwi.pdfIn PDF document text
    • http://files.susanrlawrence.com/uploads/1/3/2/6/132682925/6896654.pdfIn PDF document text
    • http://files.teacherarium.org/uploads/1/3/0/8/130814127/vowuv.pdfIn PDF document text
    • http://files.eahae.online/uploads/1/3/1/6/131636806/fepisaki.pdfIn PDF document text
    • http://files.bhutaniowa.org/uploads/1/3/0/8/130873728/kolobovegu_sapomeperobol_tizetu_kidiwuve.pdfIn PDF document text
    • http://files.gsacsnj.com/uploads/1/3/0/7/130738779/munurop.pdfIn PDF document text
    • http://files.nancyjardineauthor.com/uploads/1/3/1/6/131637853/puratimatakubuvuta.pdfIn PDF document text
    • http://dawigo.justinedaisuke.com/uploads/1/3/2/6/132695780/2b81ae5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/d01287_c5d829ec483e4221b47d8a527241e1d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/451a43_96641947a90642ac972fcfa6b0b8c7e6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/naparizedasolekadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3351/files/android_10_one_ui_2._0_release.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/jakuzifiwebekozexemubudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/97228578359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0845/8661/files/49232383260.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_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 5192 bytes
SHA-256: c47f62e20d13d8ffd54b2b518f3f7ccc543bccdfd910691af979bdb400d92617
font_01_sfnt_off000074cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 10316 bytes
SHA-256: b2d820f4a1de74afbbe2d4627e5f41b2872bbd4e13d3817bc94d107e2d1fc071