Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd50a9c22066412…

MALICIOUS

PDF

41.8 KB Created: 2020-10-18 09:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b2d4bf858d6a4551ee37ec8452140da SHA-1: ce6f0462f5f24db1f3805c834b0bab097d24c57c SHA-256: dcd50a9c22066412b84a12c37d74c0cfa15dd134de21f611d0b9ba93d99b5477
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm hosted on disposable domains. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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/123?keyword=proactive+vs+reactive+management+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f882f3e95794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f8aa56fe4624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f87001b1a97b.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/vibule.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/jelenofaledif-nunibapikire-noboridezaru-betuzelarimali.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/fojemapisemu.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/1462530.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/fovep.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/pugefod.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/adc32d3ffa92831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8732b5b7812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f890fb5ebbd6.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/punedatotum-vodokubokex-lajifut-zonujasus.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/de7bd3.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/pemup.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/84dfac.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/8118384.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/kowitet-zitegisuja-robop-juzutug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 5504 bytes
SHA-256: 7984e6029c80b5e24e25d3c5ee622ec32ac6097aff05cd6aa80664f7e9321e9d
font_01_sfnt_off000079a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A7 9552 bytes
SHA-256: 9fe34e2b73fed78f5e6073c88ee2958af5de667de580d3899ec2d7c07dc24c40

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