Malicious PDF — malware analysis report

Static analysis result for SHA-256 532d073a37c80fe6…

MALICIOUS

PDF

69.2 KB Created: 2021-01-01 12:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e5150a82904f5043f7e4556c069404fb SHA-1: 3df61157e39ce1984be21bbb573bee0de0df6439 SHA-256: 532d073a37c80fe6161e56e37f5eba1d116be30b28072025d71448285fb926b1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link to 'traffine.ru' and a PDF link farm containing 26 external links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=unbroken+soul+literary+analysis In PDF document text
    • https://cdn.sqhk.co/xogedusov/gdUq5hi/83692906286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_5fa14267ba8fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_5fb32b04ee3b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_5fc57518ecc11.pdfIn PDF document text
    • https://wisadokuresagor.weebly.com/uploads/1/3/1/4/131436967/3908676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5fab0904209b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fd18c6462d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87412a11b9b.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/a024d3ee-d9f4-4ed4-9366-922687c780a3/10991803854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b696174-c12f-42cf-b2e0-51ae1aeeeec3/kafufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2497bd8d-ad0c-44c0-8fa4-19737504b390/nfs_most_wanted_indir_gezginler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5305d1a-5f25-4279-9d04-105d820b80c5/doss_speaker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9e2f84-c75b-4aa2-9afa-0cade90acb84/linksys_ea6350_review_cnet.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_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 4976 bytes
SHA-256: 532465312b19d55ddfdba984f308c255d8dba78e3313bd6b057dbc3dc2849ac7
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 9868 bytes
SHA-256: 38b17c9998c78a6aecd89d50fc33471468d48bbba06f566a2ee8cb75b5c74d52

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