Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6e6fd1e67a88d1…

MALICIOUS

PDF

42.2 KB Created: 2020-11-03 19:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f29b97a972d5975062107ca85a576de9 SHA-1: 5c3fd7a9bbc426e45e13321ca4900554b9a9f879 SHA-256: 5c6e6fd1e67a88d1c1aab6555c093dad791c65404dd91a15f731fe5aa7d73c19
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document employs social engineering lures, impersonating cloud services and promising content access to trick users into clicking malicious links. The embedded URL `https://ggtraff.ru/strik?keyword=ladybird+google+drive+full+movie` is identified as a known malicious redirector, and the document also contains a large number of links to other PDFs, suggesting a link farm for SEO manipulation or further distribution. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared 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=ladybird+google+drive+full+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f9579a075b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f936af0e00b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5f9d98c0817eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f8f0a4b730e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f9a832e7191f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f8e58748af3e.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/ramexomoxukofaxem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f9f13032c40f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5f9237af7477c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f9655d8ec406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f905585f2ed5.pdfIn PDF document text
    • https://tuxonojetivap.weebly.com/uploads/1/3/4/4/134437157/lekowarim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f9d7e17d5fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/gajufovujapagufamix.pdfIn PDF document text
    • https://s3.amazonaws.com/banijugoniragom/63090656748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ea6219-7e34-4b46-a777-8cf35ea204f6/lesozijokod.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_off0000669b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5292 bytes
SHA-256: baf5a676e1f5a2eb3d2251a1498eea369cee33f871af99514499bc880da49396
font_01_sfnt_off000078a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 10348 bytes
SHA-256: a1f1a7dc395435d7f9eae2f5b7d7f18d5e18ae71788be97ab29e18bbb29478b2

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