Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34286819be4a5dc…

MALICIOUS

PDF

51.1 KB Created: 2020-10-31 20:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76ebba5829e03698122e55a02adbf29 SHA-1: 9d57ecf14f208cda63ac3556a7d94d58cf6283e1 SHA-256: c34286819be4a5dc9f85918ea684097183eef9576b74850ca92d7197d08a2cce
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicates maliciousness. The embedded URL `https://ttraff.link/123?keyword=samsung+tv+replacement+parts+uk` is the primary indicator of compromise, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.link/123?keyword=samsung+tv+replacement+parts+uk
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f9206c68d656.pdf
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5f8a204c56017.pdf
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5f96873633530.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4665135.pdf
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/muvamezuwiju_sunovopekug_lozova.pdf
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f93b0774207b.pdf
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/levimixalo.pdf
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f955bd242250.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f87f7737bba6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/miwolezedubujoz/technical_analysis_trading_making_money_with_charts_download.pdf
    • https://uploads.strikinglycdn.com/files/16a0f6ce-c002-4478-959c-18107852ce3b/pofugelotal.pdf
    • https://uploads.strikinglycdn.com/files/8bc474ea-fcf4-478c-84b2-bce105f6abdc/62743185.pdf
    • https://s3.amazonaws.com/tadovu/2d_animation_process.pdf
    • https://uploads.strikinglycdn.com/files/c500b3ab-b7b2-4e88-b4c5-a34613a4b70c/relinife.pdf
    • https://uploads.strikinglycdn.com/files/fe92972c-73ce-46fe-b9f9-eb36260bb1a8/bandit_guide_maplestory.pdf
    • https://uploads.strikinglycdn.com/files/af455b72-b9fb-4486-a50a-56e2e77730d7/wositogogap.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_off000087ec.bin
da7966ca3ead4f8d6a3b93b4b30b15bfe6c24f6b9ea9f537c43796fdd2b928f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x87EC 5480 bytes
font_01_sfnt_off00009a86.bin
28cbb3edf3326daff8ee76e0295d8bd6a117a01611470ae3dfdcd92fda337708
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A86 10668 bytes