Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf1ed720b14f92e…

MALICIOUS

PDF

52.3 KB Created: 2020-11-03 02:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5f1a4589ef00184aa5d5314020974d7c SHA-1: 1f77bf2e06138630e019fd3a76b398cc1c2eb50e SHA-256: 9bf1ed720b14f92efeca5745a6fc8424191da466a8af4d0002b90d930acbf352
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.ru/123?keyword=mrs+o+connor+handmaid+s+tale In PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/698a6b376.pdfIn PDF document text
    • https://vinemexip.weebly.com/uploads/1/3/4/3/134306635/jasezumiku-xobilemapaner.pdfIn PDF document text
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/dalalezubelarix.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/zusogogerabab_virobokemupi_gitiravaziz_sapem.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/7862dd4.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://cdn.shopify.com/s/files/1/0433/9620/2652/files/ktm_duke_1290_price_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2929/7817/files/kemadatitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2939/8182/files/nidapopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/7389/3014/files/tinidisij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/astell__kern_ak70_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8602/7188/files/lzumsuz_bilgiler_ansiklopedisi_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/3825/8326/files/think_movies_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2236/8935/files/black_and_decker_pivot_vac_18v.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_off0000824d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824D 4972 bytes
SHA-256: 3f34bc9f28e72f195cc6cb366f05db398c3bd37f5ae4fed86879cc8f0ca537db
font_01_sfnt_off000092f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F9 10452 bytes
SHA-256: 4c2c8935aa725cc0519e39bbefd085cc9e296d366bc72610c688fcb19c040008
font_02_sfnt_off0000b698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB698 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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