Malicious PDF — malware analysis report

Static analysis result for SHA-256 4411ef905b5439db…

MALICIOUS

PDF

44.0 KB Created: 2020-10-15 09:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7cce855fcd1a175f57d89774502a0918 SHA-1: f83699a4b7f54a0167d8eedbf729d25964080a73 SHA-256: 4411ef905b5439dbdda6e6f5f2ec1fe2e4a64a9753fdb6adcfee1af58b3020d5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a deceptive title and numerous links to external websites, indicating it functions as a link farm designed to redirect users to potentially malicious content. The presence of a link to known malicious redirector infrastructure and the ML classifier's high confidence score support this assessment. The document's primary purpose appears to be to drive traffic to these external sites, likely for SEO manipulation or to host further malicious content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=aplicaciones+para+hackear+juegos+online+android In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/fupepukak.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/3658150.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/de03b.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/zubezebarogala_masisemofo_kadag.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/gejugofofo.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/bobawesiwotapetedewalelux.pdfIn PDF document text
    • https://site-1043809.mozfiles.com/files/1043809/pimogi.pdfIn PDF document text
    • https://site-1038955.mozfiles.com/files/1038955/xekelafupututaxekixegif.pdfIn PDF document text
    • https://site-1041079.mozfiles.com/files/1041079/fizipivug.pdfIn PDF document text
    • https://site-1037900.mozfiles.com/files/1037900/guxafav.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/weketipuxefo.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/furizawovalaf-gisasazobobaku-leburovew.pdfIn PDF document text
    • https://site-1042625.mozfiles.com/files/1042625/64756162550.pdfIn PDF document text
    • https://site-1043569.mozfiles.com/files/1043569/80364334421.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/sudefibitumubijitazadelos.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/bujorarinem.pdfIn 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/1/0435/7973/6223/files/moxekitutibopimarerikixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/sepagiwalazulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/77230453084.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_off00006a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5464 bytes
SHA-256: 9188660e340fd3d9aca7124c53ea274f4e9a6e7d6b9c23b9ee6246b92a59ed72
font_01_sfnt_off00007d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D07 11088 bytes
SHA-256: d6ad15fd998afcab64f9c90c276e79034a0a813bcdadf8868a4751cb07440e20