Malicious PDF — malware analysis report

Static analysis result for SHA-256 14571fa59fbb468d…

MALICIOUS

PDF

42.6 KB Created: 2020-11-07 07:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 243bf5011b86b229c30fd5707dd81dd8 SHA-1: 7a8e415a2d76b48dfdc3a526fd2298bd685a7bf2 SHA-256: 14571fa59fbb468d48347db4ee171862d7637ecb89535c6d59ac0a338c2f4047
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/123?keyword=need+for+speed+payback+free+apk+download+pc', which is presented as a download lure. Additionally, the document includes a mass external PDF link farm, with one such link being 'https://s3.amazonaws.com/levovod/d_d_3._5_fighter_character_sheet.pdf'. The presence of a security bypass instruction further indicates malicious intent, suggesting the file aims to trick users into disabling security measures to facilitate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?keyword=need+for+speed+payback+free+apk+download+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f90b66f3c488.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/mebiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5f92574ba61d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f894e65debf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5f9439bb63503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8a1ca814c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5f9059d72c28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8905f57751f.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/levovod/d_d_3._5_fighter_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b868303a-0265-4cd9-9c43-b0882b715666/sivikudilukuritelal.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/nijunogudaduginipejo.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/no_other_name_planetshakers_original_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1528a3d5-9b3d-4def-bcad-7cce67143041/mobizen_indir_cepde.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/73929799322.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_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 5516 bytes
SHA-256: 8875ee3731ea69910b446bbec5d2c367abeb55247bf0540a1ed21a6e48819294
font_01_sfnt_off0000775e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 11232 bytes
SHA-256: f310e43af83a34736c1f9557ac0bedad876dda49a94cd02ae3f0dfb35ae4947c

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