Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3feb3f6988bf156…

MALICIOUS

PDF

42.7 KB Created: 2020-11-08 14:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d4fecd228ee96ca2c11317ad66b0e985 SHA-1: d04bf5393cd162bd58e57a8612b9bdcf6ccb1dce SHA-256: e3feb3f6988bf156fea3c699d9602a407c386383f32c52d32a1ca923df942434
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://traffmen.ru/123?keyword=circle+dances+for+seniors', suggesting a lure to a malicious site. The presence of multiple external PDF links indicates a link farm strategy, likely to distribute malicious content or traffic.

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://traffmen.ru/123?keyword=circle+dances+for+seniors In PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/kubowirokaxub.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/jozenisosexot-xagadanamezojok-vetojin.pdfIn PDF document text
    • https://mivubifazexaj.weebly.com/uploads/1/3/4/3/134381565/tozidoder.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/kirebamupabew.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/nojilu.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/gunokukefemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ribowazakas.files.wordpress.com/2020/11/45533864489.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/66301809810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be2c2f3-26f2-457b-ac5e-71593f44a878/3259141374.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/tobaxanitutanusox.pdfIn PDF document text
    • https://tirosagumeta.files.wordpress.com/2020/11/12005768388.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/everyday_math_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663712b5-99c5-43fb-8cca-26dbc4794dfb/32712133595.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/nowupatoxixanosukobev.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/kohler_lawn_mower_parts_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/nojibowujutebedumazi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/40972866243.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_off0000697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 4920 bytes
SHA-256: bdee7f33c087e51e72ca73cb11e391e2d187a6417df5b0f62784edef762d1e3a
font_01_sfnt_off00007a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 10380 bytes
SHA-256: a2587e79ab75bc60dfd3b4fbe29657001d52f096d9894b373ca6ec922925d174

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