Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3ea505e7c45a14…

MALICIOUS

PDF

53.5 KB Created: 2020-10-04 06:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7de8ef9d7079f9ab067e3fe01839c89b SHA-1: d28f38bc46591aaebb00b35f5579c7031bc6624c SHA-256: 8c3ea505e7c45a141802e42a7b84d381a0eac8a59f3aa6d263302a27564a2936
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure suggests it's designed as a link farm, likely to manipulate SEO or redirect users to malicious content, rather than providing any meaningful user-facing information.

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://gettraff.ru/strik?keyword=ldnm+bikini+guide+pdf In PDF document text
    • http://files.atpgolf.com/uploads/1/3/0/7/130775786/6181415.pdfIn PDF document text
    • http://files.aesklarskiokb.com/uploads/1/3/2/6/132695836/8557053.pdfIn PDF document text
    • http://paguj.smuttynosemurders.com/uploads/1/3/2/6/132682883/15ddf7297f3.pdfIn PDF document text
    • https://site-1042497.mozfiles.com/files/1042497/kagoviwegunugoran.pdfIn PDF document text
    • https://site-1039210.mozfiles.com/files/1039210/kunatejomukomadogizinanar.pdfIn PDF document text
    • https://site-1040998.mozfiles.com/files/1040998/gosifaligun.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/92912616151.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/54475716492.pdfIn PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/31843183004.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/77882234515.pdfIn PDF document text
    • https://site-1042919.mozfiles.com/files/1042919/20109094483.pdfIn PDF document text
    • http://mevul.sharadslunchbox.com/uploads/1/3/1/6/131637316/sazedun.pdfIn PDF document text
    • http://files.thebonobodiaries.com/uploads/1/3/1/4/131453268/zetinaj-saminuzonimula-nakoxowuvurin-litigawamizopir.pdfIn PDF document text
    • http://files.staytunedenergyhealing.com/uploads/1/3/0/7/130739214/6868867.pdfIn PDF document text
    • http://files.judithasem.com/uploads/1/3/2/7/132740536/1ebd1a89.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
    • 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_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 4684 bytes
SHA-256: 507174274b01b5e337fbbecf8bcf65bbf356cebad9d3b016b55fb87619d0e2f9
font_01_sfnt_off000080b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B6 10608 bytes
SHA-256: 3265b3aee265f53b485f367722c142f861b86311576a5337c879be50b6b528c4
font_02_sfnt_off0000a523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA523 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf
font_03_sfnt_off0000ba24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA24 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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