Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c65740d3947c54…

MALICIOUS

PDF

61.2 KB Created: 2020-10-23 22:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c65d9e22a857cf53e2680f87aae7ae69 SHA-1: 94f49f249f3038e39a7249515b6cc753c2cd3014 SHA-256: 66c65740d3947c54e6b1dfd7ff34709f8eda955475151212815f9e7e45f4ba6f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many of which are benign but likely serve to obscure the malicious intent. The 'SE_REMOTE_SUPPORT_LURE' heuristic suggests the document may also attempt to trick users into installing remote support tools, although no specific script content was extracted to confirm this directly. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ggtraff.ru/strik?keyword=piano+notes+chart+c4 In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/zawejejazi-tagen-gegoki-daropipapusu.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/bokizeleg.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/vameg.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/jisomokoline_sulebukagelur_xewakolino_wudime.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/mateferorip-kunagimoxe.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/9eb16d443b80a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0136/2614/files/gmod_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1895/1062/files/vafadodofewukedulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2991/2488/files/suvedopupujebesidabagese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302e4048-cb72-4252-a859-8b624bfba3db/miboxadozowaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c780ef7a-4317-4507-bc61-3b5422c30d42/zigogesotovim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a77656-5d32-4b59-aef2-71f072db772c/wejozipefanatixorovovo.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/zetokolekemumosewom.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/academic_performance_of_students.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/59184851490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5852/5889/files/wapking_games_super_mario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8761/8982/files/bestiary_julio_cortazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4662/8259/files/sense_of_self-efficacy_definition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B1 4732 bytes
SHA-256: ef8f9c5220bf69f42747ae0cd0f8e079ebe47fa7369fc9face1027cc54c73061
font_01_sfnt_off000095b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B1 14500 bytes
SHA-256: 97b7a93294fce66267620f14be8b9a9ff99b82704327e8a611ba1de46af20444
font_02_sfnt_off0000c3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DA 16120 bytes
SHA-256: 73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75
font_03_sfnt_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230