Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d84fc9f11311ab1…

MALICIOUS

PDF

45.6 KB Created: 2020-11-02 12:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ede6ec40fa975a0678efe4cb7e2681d9 SHA-1: 2d06aac99a4dda4537a01725e7090f02fa9e4208 SHA-256: 2d84fc9f11311ab12b9790716bf2126458b58acdc06e9ed5d3b75d30e2525b8a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/123?keyword=verizon+iphone+11+manual+pdf In PDF document text
    • https://zovodexipelozas.weebly.com/uploads/1/3/4/4/134401167/tesagizuzavemone.pdfIn PDF document text
    • https://kusuxifitumaka.weebly.com/uploads/1/3/4/5/134593182/10a5bf70691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f9a8c599bcca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f985d4792354.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/firef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f9084f26c6c2.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xuwur_namamumax_misisemenanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_5f972f197ed07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/738909c9-bd2d-49dd-bc35-342d3a91fb65/65171755322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366e5857-c362-4b03-a32d-1a3e14e5ba07/psi_mod_spells.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2282/6144/files/programming_in_ansi_c_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03587e87-0ca1-4ba7-b539-815e7c9a34f4/fukerezudegibi.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6826 5172 bytes
SHA-256: 7f64251eb2d71be92d8f20b1a759e958ec83475096d987061fcec2ca5706e06d
font_01_sfnt_off0000799f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799F 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00008502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8502 10696 bytes
SHA-256: 3d7759392977ed544091ccbb9e7812ef93d249c921169e6eff8904db76fb3a9c

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