Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad41e032e975ead2…

MALICIOUS

PDF

73.9 KB Created: 2020-12-10 20:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cf3775d4c42062a71a21ff7f399c9793 SHA-1: 11e97f60197635dab1c5dc188ec83f5624d87001 SHA-256: ad41e032e975ead2d2ef3fff5b87a43ae6f8c46d5fbc0d9a595782e7edc4b2c3
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with critical heuristics indicating it's a malicious redirector and part of a link farm. The primary malicious URL identified is 'https://gettraff.ru/123?utm_term=grow+room+design'. While no scripts were extracted, the PDF structure and link farm activity strongly suggest an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://gettraff.ru/123?utm_term=grow+room+design In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f97891826096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5fa099fbec0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f917d8329db1.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/wizigan.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://static1.squarespace.com/static/5fc0e80068612547ed5e2b99/t/5fca91308e83f251611693b0/1607110960490/recargar_telcel_con_tarjeta_de_debito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bfac7de-7105-4133-9914-0343ad96c14c/emotion_regulation_handouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8a07c3-7309-41aa-8c77-f6cd43015d55/jeff_dunham_ringtones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacd4223-a2bf-40d5-bbf9-39454b44e1cd/turkish_business_directory_2018-2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/30282668749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75bed36-a990-4acf-ae80-eff016cace5a/62207855648.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc545c1084698658e7b29ac/t/5fc71e4e7995075abddd2659/1606884942505/dual_federalism_time_period.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fcb56d19708706f3999c732/1607161554500/51992799094.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 4732 bytes
SHA-256: 9d665a10dd36d8d96d2eee1a7c39a0cf96f59522bb371f0ebff577a7cc2b8d85
font_01_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 9976 bytes
SHA-256: 22309f4efe0196c0ca8a5f613119e2006b725a1f4fcd10756e2b6ee6e309d1c6
font_02_sfnt_off00010cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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