Malicious PDF — malware analysis report

Static analysis result for SHA-256 b980e1b0823446d9…

MALICIOUS

PDF

83.4 KB Created: 2020-11-18 04:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 22fdd80ad2fac85f01ce59f37ab3473b SHA-1: 1dcd2a22c1b83eaec68851bffa88b5522547c5d3 SHA-256: b980e1b0823446d962532e916f7b1d2a74634433a01c578211d902feb4061a20
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The embedded links, such as https://gettraff.ru/123?utm_term=john+belushi+college+image, suggest an attempt to direct users to potentially harmful websites. The presence of numerous PDF links indicates a strategy to distribute content or traffic, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=john+belushi+college+image In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8cbf7842114.pdfIn PDF document text
    • https://falobulavogibe.weebly.com/uploads/1/3/4/6/134662271/5538609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_5fa913ccf21dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8a5771ec608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5fa8a5ed6ebcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9c23836ee87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f8a8a2186756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f9d955659778.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/dixatenebiw_lunagor_datuwa.pdfIn PDF document text
    • https://kemolarutu.weebly.com/uploads/1/3/4/6/134685450/db3a649c9.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/cf6e67dc-5c42-40f9-9a22-003c58be5672/vusovuvatininiwumekexekil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec27bae-afd2-41e1-b958-3fbd138faeae/26515177667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1171d166-f0ce-4db6-a595-bc0777ac5be2/diego_rivera_wives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53cbc94-194a-4a6c-82f6-f92e90c088ce/camden_arkansas_driver_control_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/rustoleum_tub_and_tile_kit_instructions.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_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 5248 bytes
SHA-256: 8d4c98e4975b35a3ddc195c70ee463e602e652f643e34c539160abc2b17e313c
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 11164 bytes
SHA-256: e5039c6b1201ec7e1ad146b335a165ed9bc0400e65f294156730838feb029e83

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