Malicious PDF — malware analysis report

Static analysis result for SHA-256 70661b306d63ff67…

MALICIOUS

PDF

46.6 KB Created: 2020-11-04 01:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bbcc94d84125371d434c9c82168c9bb9 SHA-1: c98aeca9beb63f33154906015d040ba3bb88e75b SHA-256: 70661b306d63ff67a7248c54190b3ac1fb05936799ea837c26c0cec5981923d6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/123?keyword=senior+olympics+2020+ohio, which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt, likely to distribute further malicious content or phishing pages.

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.cc/123?keyword=senior+olympics+2020+ohio In PDF document text
    • https://jisogixisizula.weebly.com/uploads/1/3/4/3/134328009/rijur.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/c086d688fe5ea40.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/moduxanakuri/administracao_e_gestao_de_empresas.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/rain_bird_isa_304_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/seattle_city_zip_code_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/bacterial_capsule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed906121-c903-4bf3-9a84-4370f57a5f24/gomebupikodikasum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e7c018-7535-4f25-9b14-f86d20dba224/40265153673.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/text_cases_and_materials_on_criminal_law_in_zambia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba758b07-4055-43df-b553-b6040b7cb475/sezijukobajawabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c0fa87-07b4-4921-a3c4-ae3393a84a1f/97470828557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edc124f-ee1a-4ec3-a602-bafba9fe8da9/7202981265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21496bad-7431-415a-9ec7-826688ffcf3f/4632343578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ea0a0f-5acb-45ea-849e-44b12f550959/93397421884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d498f079-5956-4cf3-bf90-edd7f3f82c1b/betukisuja.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_off000076dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 5444 bytes
SHA-256: 4f30abc5164b80911c708e0c4115acacd82a1c1be22249fd7b41bd44fdb08070
font_01_sfnt_off00008942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8942 10656 bytes
SHA-256: f3037397b05c684f5d371c1c37668d9b0e767eaf573c621d3c7ca201aec31874

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