Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5cf0176de586c1…

MALICIOUS

PDF

72.4 KB Created: 2021-01-10 00:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c29359afdf2b25dda4e0de8a4352b12a SHA-1: 0bce770702864855f26d8c56b65003b301411359 SHA-256: 8b5cf0176de586c1ba20568df4b61a8e5b7216bc349f11478893c0735c36ef99
184 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 critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://traffmen.ru/aws?utm_term=fashion+christmas+gift+guide', are designed to lead users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/aws?utm_term=fashion+christmas+gift+guide In PDF document text
    • https://site-1173181.mozfiles.com/files/1173181/piano_tiles_2_apkmirror.pdfIn PDF document text
    • https://site-1227468.mozfiles.com/files/1227468/sejesaxi.pdfIn PDF document text
    • https://ruvezidarumova.weebly.com/uploads/1/3/1/3/131380493/xokata_bimibaxate.pdfIn PDF document text
    • https://site-1172077.mozfiles.com/files/1172077/vamivonodoxi.pdfIn PDF document text
    • https://site-1172428.mozfiles.com/files/1172428/free_printable_cute_to_do_list_template.pdfIn PDF document text
    • https://site-1179868.mozfiles.com/files/1179868/67442117116.pdfIn PDF document text
    • https://site-1174847.mozfiles.com/files/1174847/oklahoma_state_football_scores_2019.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/wamipomifa_gamivo.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/samsung_s10_email_configuration.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/39649516184.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/74926969908.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5356 bytes
SHA-256: afbe414cdf1b380c54bb65a977d12c1961813200b98d288b239a9efd1148fb72
font_01_sfnt_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 11068 bytes
SHA-256: 62aff18d2fd784528534de2999cde62629b08c930585194c3d7a47a1793c95a0

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