Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfc789a920cfbe0…

MALICIOUS

PDF

32.9 KB Created: 2020-10-31 02:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf23fc3815b0a3da2284e9a6ccfb61c3 SHA-1: 2e08c992d5fcd5a98db322c73ba7fe9e4d44a09b SHA-256: 6cfc789a920cfbe05c62aaf808c321f362485c08b69fb29039fd03022ad52275
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector URL, ggtraff.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to a malicious site, likely for phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/pify?keyword=whack+your+boss In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5f95107ee5ee8.pdfIn PDF document text
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/2867022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_5f958eb25211f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5f9c966b0a5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8b6847c2235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f881d3dcf3a5.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/pibabopuduj/ludovico_ariosto_orlando_furioso.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/latitude_and_longitude_worksheets_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9599/files/w-8ben-e_instructions_active_nffe.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/44506023350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/solotob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0462/5579/files/daxobufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9052/4318/files/calendario_completo_liga_mx_2020.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_off000045bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45BF 5176 bytes
SHA-256: d56a02017daab80d18bdfcfd092ca4615939769c7a99bae0fbd3b57ccf24bc94
font_01_sfnt_off00005764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5764 9348 bytes
SHA-256: b4e88c4c8d1208e8f5ef046fb668974a57ca7db631d8a9baac358729a3c0ba2c