Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e08f22e3f2d282…

MALICIOUS

PDF

59.9 KB Created: 2020-11-11 11:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eea21dddf2eddcebe36b3ea9a3fe6045 SHA-1: b4f7f2d3e760b692f6caa83abf7404ecb743aba4 SHA-256: 76e08f22e3f2d282cca88025beaed4441e29f2727c1d17bc151090107d58a318
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to the malicious redirector 'traffine.ru'. This infrastructure is commonly used to host phishing pages or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/strik?keyword=word+that+starts+with+se In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_5fa930013d749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5f9e585251492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_5f9d8acba18af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5fa6025aeb2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5f9f2690ab006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_5fab96d75bb58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5f8feef56ffa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5f8ec2d245b95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5f9be12779d59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb755ef-6955-438f-be6a-cac8544cf222/microsoft_rewards_select_3_scam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3f1fb8-6c33-4283-9f7a-18e3cfe03dd3/hp_fax_test_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001e41c3-617d-4101-b029-0fcecfe3ce12/powot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd055f54-e830-4f5c-a31b-29762f3bd622/raxegeganotibeniw.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/1761135575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6ac91e-afa8-455f-9bc0-066bd76c2598/31871968298.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 2

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_off0000b0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EB 4988 bytes
SHA-256: b26c38dff07d48f112eb96074c53a4e5c124d94fde75d024e41a3f8c4e5c67c6
font_01_sfnt_off0000c1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EC 9668 bytes
SHA-256: a418a383f318e1be7f360049376fa6817abf4685b953e32f9038067165369011

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