Malicious PDF — malware analysis report

Static analysis result for SHA-256 491e9be84dce7700…

MALICIOUS

PDF

79.1 KB Created: 2020-12-19 21:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0daf132f4fc7d2b6d91e06cbc7edfd76 SHA-1: d547b1f7437bfa1c8f25fd06df20a052ee0bfaec SHA-256: 491e9be84dce770076173ef8add788149e959428affb237f3004188a4fc36117
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic indicating it's a lure for free downloads, redirecting to the URL https://trafficel.ru/strik?utm_term=motor+speech+assessment. This URL is flagged as a redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=motor+speech+assessment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fb3ef0f409c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5f990827ed6ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_5fdbd7fa9b623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5fa1946d9b102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5fc028508404b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/77445050843.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/dexcom_g6_product_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/cisco_3650_switch_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/wajekodezojigafevoxaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5662fea4a794d56634e63/t/5fd660fb154d727871eb5788/1607885051671/9773020410.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/mandalorian_helmet_visor_template.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 6548 bytes
SHA-256: b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7
font_01_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 4888 bytes
SHA-256: b557b24a3e7ac68269227d2e075bedcc977a3de427b6c0f5b4228c825b2c7c0a
font_02_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 11472 bytes
SHA-256: 9f822822b452804b3c54aae7663711d9b177b5f34ffb10b15a8a66a231be43f6
font_03_sfnt_off0001211d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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