Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1f9db1b3ef32f7…

MALICIOUS

PDF

40.3 KB Created: 2020-11-02 22:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bfd4d31b1ea12fe0534133112e120d2b SHA-1: 166449ecdf1540af8602104fdcd6825a74ae8a8f SHA-256: 7b1f9db1b3ef32f7c0a4525fff87f051bb06ed93645194205dcdb8eb2004dc04
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'perfectly elastic supply' and the URL https://ttraff.cc/123, suggesting a lure to a malicious site. The presence of a link farm heuristic further supports the malicious intent of directing users to potentially harmful 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://ttraff.cc/123?keyword=examples+of+perfectly+elastic+supply In PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/a30efb594c35.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/5094659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8ed862b717c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f917af920d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5f94d31f22d42.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/bevaxogesopij_lajabix_zosole_funararasofenob.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/866dac9cdb.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/1/0499/9420/3331/files/3_speed_manual_shifter_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/annotated_code_of_maryland.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/botw_editor_cemu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/rejanedipoxakumokek.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/31630827977.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_off00005ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 5288 bytes
SHA-256: 8a80bb3233d7a6dad8e6619829d026ea7f461c4752989c2eb993f8d81750e2d8
font_01_sfnt_off0000709b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 10452 bytes
SHA-256: b715971e46b70dc804a8f75a993206b21e690ce98a6cb042aed5ce0ff23a24d2

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