Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb3f14924ba68d4…

MALICIOUS

PDF

47.6 KB Created: 2020-10-31 12:32:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 322b88ec97986777b1d36d64db02b68b SHA-1: ec230c46ea017b5c80c01dea9e6e34d05b13fdb6 SHA-256: 6bb3f14924ba68d43c568ab462bd4dcea17ea8895f7dc57c1f2a4e15d795d079
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ricks sports bar' and a URL that aligns with the malicious redirector heuristic. The presence of numerous external links, including one pointing to a PDF that appears to be a software download lure, suggests a link farm or redirection tactic to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=ricks+sports+bar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8d5f15753b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f9b5a337b7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f8b1b6d08a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8e0ddf4c72d.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
    • https://uploads.strikinglycdn.com/files/ac4e7e06-228e-476c-98fc-cd55c38086b3/download_softi_scan_to_full_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5959/2349/files/pinasidadabusolutabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9175/7737/files/miglior_autoradio_android_golf_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2210/8837/files/journalism_interview_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/kowide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4414/1731/files/co_curricular_activities_teacher_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4147/9578/files/maryland_child_support_calculator_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc4a11e-afb4-4330-af3d-b075a0568614/73503200017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7682/8318/files/realising_your_potential_myles_munroe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 4668 bytes
SHA-256: 991b8320022e24d10538b608b13974a5d7763f208d1bca9438558ccff66fe66e
font_01_sfnt_off00007f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 10760 bytes
SHA-256: 7aaf77a3574d98e045c7bca6501b40a9e8f6927a5ffb30755a9942a71eea8079
font_02_sfnt_off0000a3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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