Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2118e14c4181826…

MALICIOUS

PDF

39.9 KB Created: 2020-09-18 15:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c9e6b7dceb69bfcd3d85931b29b34ffa SHA-1: b94e71230160ca61dd1a49cd7fd3e9de1152c8e1 SHA-256: b2118e14c4181826f8055fd4011545ec56027e199a60dc9e9e02eb5f553cce46
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.com/wix?keyword=index+fossil+worksheet+pdf In PDF document text
    • http://fonup.tigerflyoutfitters.com/uploads/1/3/1/6/131637432/xematulukarin.pdfIn PDF document text
    • http://files.feliciasfashionboutique.com/uploads/1/3/0/7/130739227/589627c5823f4f2.pdfIn PDF document text
    • http://files.borderpartnership.org/uploads/1/3/0/8/130873943/6414347.pdfIn PDF document text
    • http://files.drumvoice.org/uploads/1/3/0/7/130776483/kozukijosuwu.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/1/0435/6620/3029/files/p90x_lean_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3642/9466/files/7385142626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5097/4888/files/tesoniwul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/77197046072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/pegize.pdfIn PDF document text
    • https://83f56655-92b4-4636-ae04-be999e702dfb.filesusr.com/ugd/105a8c_4555fd68638349d1bb7ab705fb8027a3.pdf?index=trueIn PDF document text
    • https://f044620d-6ec7-4a4d-b047-41814ac50a9b.filesusr.com/ugd/6e2da7_5ecfea6a4fc445df9ca00c1dded0bf2a.pdf?index=trueIn PDF document text
    • https://f4024120-d924-4cbf-b415-3df5e9c9e2b3.filesusr.com/ugd/ffe0d3_1936de3351ef4fc686ee1d784d61ff2a.pdf?index=trueIn PDF document text
    • https://283b4283-2532-43b4-b35e-22ab02ac0aec.filesusr.com/ugd/5f4192_840fcd57c73140ba861dbede27094c2d.pdf?index=trueIn PDF document text
    • https://b6ecd275-cc0f-4e95-b4b0-b77a216d8fbd.filesusr.com/ugd/5ecadc_ae1a71cfa6494ed6883801e17784c0cc.pdf?index=trueIn PDF document text
    • https://cc3f6625-b578-481c-b257-4a7467301586.filesusr.com/ugd/dd6616_165476fd01c34fb380842dbfa05e260c.pdf?index=trueIn 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_off00005fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 5080 bytes
SHA-256: 38f350a384e501b01f04aa27b4599a896642b091e1c960ff080481f672033cf4
font_01_sfnt_off00007120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 9960 bytes
SHA-256: a30b2c5a67e92c2a1f072370d1f2518d4816a61bfb930a1b7fe3e06abf29d8b9

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