Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fef526bd0a3b94a…

MALICIOUS

PDF

75.7 KB Created: 2020-10-30 17:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e9a1170937efbc7d5e6db550f8cd49d1 SHA-1: d7ca0f8d2484a04df3c02b8874bc1e3b625c9450 SHA-256: 6fef526bd0a3b94ae097e8cf5f7b0350385a4306d0363ebdc6efb569666bf45c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.link/123?keyword=daoc+uthgard+necro+leveling+guide In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fokapikow/reluratoduxusasevezipur.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/kutoboniletifunewusew.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/vt_lottery_second_chance_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/24808654087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8016b6a1-1132-4a28-823f-0cbad3e466c1/xuresafiriruxenewefa.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/50444054240.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/nudejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0341/9041/files/nepikelezulelupojid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695f8c09-7d3b-47b9-85e8-387898e3b233/29219485483.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/masterpieces_hospital_architecture_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9377/7312/files/final_fantasy_14_amdapor_keep_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/sofinarapopimarudapuwalot.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/51986907640.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_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 5084 bytes
SHA-256: 8ed1464877e21fae174c138dd93eda5453c4ca69dffe25d3f31274f4b45704d4
font_01_sfnt_off0000fd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD28 11072 bytes
SHA-256: d9a2cddb5a25636687b5d5bb59b6ad42f36c8ad23881fb9cf25d20b15f32b6f1

Open this report in the interactive analyzer, or submit your own file for analysis.