Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd06e2caae0d95fb…

MALICIOUS

PDF

49.0 KB Created: 2020-10-26 20:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 450abe1a403e13296cf73e3376b5cf21 SHA-1: 83c68f4d30bd06c62cf9526d30949f68564cd7c5 SHA-256: bd06e2caae0d95fb572f66ec1e3cdcdb7418192924b8f58ca1fe2e3c1baac1d1
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector services, indicating a link farm designed for malicious redirection. One prominent link directs to 'gettraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'wkhtmltopdf' and a URL, suggesting it was generated programmatically to host these malicious links.

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=mr+rogers+youtube+theme+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_5f959024c27a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8758c27b07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8f2b3118351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8a93143b360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f95d60780c4d.pdfIn PDF document text
    • https://zuparimetusu.weebly.com/uploads/1/3/1/3/131378993/bujajunewu-veguripalu-lufipotakedo-rokilivofuxi.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/bozupupavixokuwu.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/wimubikor-jijiloj-jemabo-jibeperukidu.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/gitukot.pdfIn PDF document text
    • https://toxavikosas.weebly.com/uploads/1/3/4/4/134437834/c05864.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/mizapawulovigo.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/sivewisuvoliget_jabibaner.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/1/0433/4200/4375/files/tibiximazumob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9998/3524/files/smithy_lathe_mill_drill_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/fotobebokizuzotamapedewet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/8787/1397/files/chemistry_exam_answer_key_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/marketing_information_system_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bewepinulepexovuxajubala.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/a_byte_of_python_3._0.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/just_mercy_bryan_stevenson.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/icelandic_language_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/sahih_bukhari_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/anemia_aplasica_de_fanconi.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/ssc_stenographer_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/vejiga_hiperactiva_tratamiento.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_off00007e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E30 5104 bytes
SHA-256: 541bc786871f8bc113619365ab0fede60c4d814dd8dc7d6e71aec9b2a21fee18
font_01_sfnt_off00008f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 11388 bytes
SHA-256: 8240d778aa02f9bbc95c1eb4744258d000c12f86812eeffe2b5fa1b0202b198a