Malicious PDF — malware analysis report

Static analysis result for SHA-256 932811db3529cee0…

MALICIOUS

PDF

45.0 KB Created: 2020-11-02 21:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7355857d3336a5a7518c4d60d73df7ee SHA-1: 784ad88cc9f7d2184ac017ea596f32067db96cba SHA-256: 932811db3529cee0a6fe2c62058526261d5250673ce1503bf56f6e629219f858
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links pointing to external resources, forming a link farm. One of these links, 'https://ggtraff.ru/aws?keyword=montevideo+schools+jmc', is identified as a malicious redirector. The presence of numerous PDF links, many hosted on Weebly, suggests an attempt to obscure the final malicious destination and potentially engage in SEO manipulation for broader reach. No scripts were extracted from this sample.

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://ggtraff.ru/aws?keyword=montevideo+schools+jmc In PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/a3f5d0cdb.pdfIn PDF document text
    • https://dawozonejuveru.weebly.com/uploads/1/3/4/4/134489779/3677b99c1f50f7.pdfIn PDF document text
    • https://luvuzinek.weebly.com/uploads/1/3/4/5/134502649/867a7a64cc07f5d.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/tavemiluj-ruzepafasefimap.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/dewevuzu.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/1/0500/4224/1188/files/85957947400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3938/0394/files/6250679944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95869218-0f68-4be2-bd70-295494841e3c/14582605288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8364/4058/files/download_game_naruto_vs_bleach_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3872/2206/files/wow_leatherworking_wotlk_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/4070701872.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_off0000715a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 5016 bytes
SHA-256: d34457b91ae9d883440537d3964c62a75e0c52459adb574e6e2de7e279e6d2a6
font_01_sfnt_off0000825e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 11108 bytes
SHA-256: cd31eb6bfaab4bd791d76e85bb51c2f33d2cbdb88e66a66656d2adf8a6d915dd

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