Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef817c4587cefec…

MALICIOUS

PDF

43.2 KB Created: 2020-10-25 05:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ef6a0c63873fb6da31cb7f1754c984a6 SHA-1: 8949896b491e8d31b7701cfc61460c31f71fb865 SHA-256: 4ef817c4587cefece2b75275b4927fb38628c2ebd40cb9cf1b171d8ee36cb716
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links that point to a known malicious redirector, identified as 'ttraff.ru'. The document body, though partially corrupted, suggests a lure related to beauty product instructions, which is a common tactic for phishing or malware distribution. The presence of numerous external PDF links further indicates a link farm or SEO manipulation for malicious purposes. No scripts were extracted, but the primary malicious activity observed is the redirection to a harmful URL.

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://ttraff.ru/123?keyword=colour+freedom+white+blonde+toner+instructions In PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/deneb.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/1beae7928cd13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5f904dbf37c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f8e4a3d21f5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f89efc449767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f874ff4d29fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8a7b257ab64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/96467575140.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/semopak.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/formas_ser_bachiller_2018_resueltas.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/nujewepij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81584797-e54b-4e5d-80ee-901b5794ed21/operaes_farmaceuticas_o_que.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05afb430-cf9a-44d2-a0e2-71f205aeebbf/63545025214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c2f689-312b-4dab-b0d1-474d315b9ede/49559548685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b97132-f1a9-4758-9bf4-ff8584cb83ce/wimupagudanewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c325087-c5fb-440d-ba5b-e11482f4adeb/paper_model_airplane_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3361a46-12a7-4b6a-9d0c-db22d909b820/82103532952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03167c77-db28-40f3-9991-7091e1ff6ebc/jelebejonolugefix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5118a861-3aeb-4df7-9983-99007fceee59/bidufid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f306ea-3581-43c9-8ae0-545c71c2eb83/9017768641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011b93e9-134e-474a-8955-aea01bb36273/96049820635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26e5d91-33cf-41eb-b072-36267ee08e68/pevowi.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_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5188 bytes
SHA-256: 1c0d59acb46e4f786b229b2c75abae54c3b41b84f4e6217162b5660e99720bac
font_01_sfnt_off00007a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 10884 bytes
SHA-256: 45deb7f0c5d6d2eeeb5540edb617dfafd87b3e04375bad077a00124854dd88b5

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