Malicious PDF — malware analysis report

Static analysis result for SHA-256 986f50ffaa64467f…

MALICIOUS

PDF

41.1 KB Created: 2020-11-01 22:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 18655bd74665adf0486eedbda709240d SHA-1: 21a34fa396be44b73218c36cd7a10e31cc4981d9 SHA-256: 986f50ffaa64467f915466273783ff21c3ea746fa8e2c8a0e59dfbddc6092c33
154 Risk Score

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.cc/123?keyword=reason+for+song+song+divorce In PDF document text
    • https://sitawixabebel.weebly.com/uploads/1/3/4/3/134319036/1f240a5be.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/629a99d.pdfIn PDF document text
    • https://wojisixid.weebly.com/uploads/1/3/4/3/134359836/liwum-pinasikiluge.pdfIn PDF document text
    • https://davijoxo.weebly.com/uploads/1/3/4/3/134357566/dedotokaduju.pdfIn PDF document text
    • https://cdn.brilio.netIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7299/9590/files/34310141760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1083/2574/files/99563278703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0787/4490/files/android_ringtones_and_notification_sounds_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3563/7922/files/mekong_cafe_lunch_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7250/7044/files/aos_90_glitch_apk_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5140/0391/files/43929519708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/mann_movie_download_full_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7613/4082/files/wivukadigux.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_off00006271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 5224 bytes
SHA-256: 86c53eca57313fd68234045126f77b1f32b2d7b7ab7256c4ab46b4c6ef77a1b1
font_01_sfnt_off00007457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 10468 bytes
SHA-256: 81ac217b2f91c0b69e263a13774157fd6c055fe1767b0e33793ce237a49198ba

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