Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e75d90c911f1682…

MALICIOUS

PDF

67.4 KB Created: 2020-11-12 22:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24a9b2de438a4e8b5515e42733923cba SHA-1: be48b58e33ddab99a9152023e205cb3ea6bbb63c SHA-256: 4e75d90c911f168263bc0b0da8d9b19507a5bffdb6db08a10d9d9950ade6a772
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The file contains a large number of embedded URLs, forming a link farm, with the primary redirector URL being https://cctraff.ru/aws?utm_term=dance+of+the+goblins+bazzini+sheet+music. This suggests the document's purpose is to redirect users to malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=dance+of+the+goblins+bazzini+sheet+music
    • https://davavenetu.weebly.com/uploads/1/3/4/5/134500413/sebujepunajixu.pdf
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5f9df74039a35.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/e467f6cd0.pdf
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f93fb79637c4.pdf
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f9bd976e6f6a.pdf
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f8e0a26b298b.pdf
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/846732.pdf
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5faae4ac17d46.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/27a9b7dc59.pdf
    • https://paxudusumumo.weebly.com/uploads/1/3/4/3/134312151/6381802.pdf
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f90f78aba748.pdf
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f9007236db8b.pdf
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/156945.pdf
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/mowalibaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/votubukaxogilix/2533282550.pdf
    • https://s3.amazonaws.com/zuxadol/matinijan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc52.bin
ef87528c29e495fda44209ba13d8605490c4453fe06ce34a44fd69e4d1f22cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC52 5388 bytes
font_01_sfnt_off0000de99.bin
86fde5e4170d551d727cb03d9e2e6e2718a73b75874d30cb770b9e2934082937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE99 9952 bytes

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