Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10ec22c119d082d…

MALICIOUS

PDF

38.4 KB Created: 2020-10-02 19:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bd696464a07f2284aa89606344f8eae0 SHA-1: 478965e36b028ddede84852b341e66cae200cd1c SHA-256: c10ec22c119d082dc1b889ed60514a151363cd9c00c765d3cbfb81a2dace6fe7
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://gettraff.ru/strik?keyword=les+enqu%25C3%25AAtes+de+la+main+noire+pdf In PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/58000168913.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/tarasenoj.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/92533780321.pdfIn PDF document text
    • https://site-1038454.mozfiles.com/files/1038454/duwulobixanimavoriji.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/60885279398.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/68613626475.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/23762706471.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/72618215052.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/xumuliwodi.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/xemuk.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/1/0480/0600/4895/files/wodiniporikovutitejig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3451/9963/files/merazimenolinobobog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2086/1092/files/werotewigubufasetixovokot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3522/8317/files/57723657242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/71366663599.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_off00004993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 5284 bytes
SHA-256: 27e1dd92c15cbc27f3e47cf9ae3d957b441d0f4388ef21b931c873a97cedb019
font_01_sfnt_off00005b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2A 10600 bytes
SHA-256: 4c5ef30dc6e7b86f7994f2f5ea06987e354e1386831f2780f84618aa4acc3aee
font_02_sfnt_off00007cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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