Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b6112feac8cead…

MALICIOUS

PDF

48.4 KB Created: 2020-11-02 07:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ba27fdec55889cc359eb8f57987b536b SHA-1: a5c6c113482f5455eeaa0afe1f1b2e144dfebcc1 SHA-256: a0b6112feac8cead6179bbabd1590ea92ecdf062cec03a8d4e08460b7e35df11
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://cctraff.ru/123?keyword=google+sites+download'. The document body, though heavily obfuscated, contains text related to 'Google sites download', suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure and malicious link strongly suggest an attempt to redirect users to a malicious site.

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://cctraff.ru/123?keyword=google+sites+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8764e56d046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8fbba4d157a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f90d73c43041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f944c06dba37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5f98f00cec152.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/1/0428/5664/4774/files/26409883899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/64715077369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a29565-807a-4053-9a43-11e37ee786c4/jowalojeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5604/4469/files/vamalutam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/areas_protegidas_de_chile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9821/files/historia_general_de_mexico_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4143/7851/files/alert_dialog_full_screen_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2f6ddf-ba2a-40f3-8926-aa2d0d6b6603/77753442154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5092/0855/files/norwex_kitchen_cloth_vs_textured_kitchen_cloth.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_off00007f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 5020 bytes
SHA-256: fa50748f81aa2a3db2aa62ba9ca06d715d56fb7c1542937132f39fed42d023d7
font_01_sfnt_off000090c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C7 10656 bytes
SHA-256: 622ee795a9cd035adc3c5d49f1ce9f291d6c552122d3de62cd2b2f6da13ea47b

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