Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cdae6956fad251…

MALICIOUS

PDF

54.5 KB Created: 2020-11-02 07:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4cea7ffcead18d191750a6ea105908d9 SHA-1: 1de03c49c7c121dd44cf51baf597f16b9aeedc24 SHA-256: 60cdae6956fad251973fa6ca5ece9036d60a8d1dc240234d3baab0bf56429b8b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is part of a link farm designed to improve search engine rankings, likely to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://gettraff.ru/strik?keyword=church+invite+letter+for+conference+sample In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5f963b16c7205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f88acc7e0526.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/dc056e.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/1/0493/1551/2479/files/56442130146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/parallel_quest_guide_xenoverse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464fa4c3-ab42-482a-a512-633a8caafa32/19683990939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fd4b71-6dab-4994-9813-c9eb1205f070/45216915186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4784/8602/files/tiwipibujarotemojun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b279202e-7abc-476c-a70e-80da20c58787/jejudanaka.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/begezubigujezes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1eb906c-1cf8-4da3-ba94-317e30a8108a/wonder_pets_save_the_duckling.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 11640 bytes
SHA-256: 967f267ecbb9adde96cc30c968a84c7847fb389082a0e29e98857c35d12eb523
font_01_sfnt_off0000973c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 5220 bytes
SHA-256: ddd82ff4aff002d55f2f1d744f6c118d7d803da475ea76d5e7724a6f0c180ab5
font_02_sfnt_off0000a8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DD 10416 bytes
SHA-256: 40e7d1f3da0b43322be398861df6e56ad77d80acf86b1e7fbd829a147bb2880d

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