Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1ce6ae53e48f0f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-09 13:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97d6434b4f92f26ac07f3bc18f9b60f SHA-1: 1d7daa236452abd6ebdea8a0bb13425484c42a53 SHA-256: 6c1ce6ae53e48f0fb89d5390ab768edb485480d154eecf8a3f89c95626e9365b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

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/pify?keyword=ebook+reader+f%25C3%25BCr+pdf+dateien
    • http://files.neuropsychologyforyou.com/uploads/1/3/1/3/131379828/9ad2b7dbd7e179c.pdf
    • http://files.stjosephministry.com/uploads/1/3/0/7/130738998/c2d3d71c66a22.pdf
    • http://files.minneysyachtsurplus.com/uploads/1/3/1/8/131872285/7373998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/define_aggregate_supply.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/customary_international_law.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/14598140480.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/76490880192.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/angiogenesis_in_cancer_and_other_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wutoveteg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/34354888278.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/dujusamopom.pdf
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/google_to_word_converter_offline_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/data_analysis_books.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f85.bin
8132230d774f77ed13c1c9ffbac61a34958afcd3126ad03fd4949eb437ab3599
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F85 5108 bytes
font_01_sfnt_off000090bf.bin
185cb428a093d720430fd700b3e9f11a0ac30b2c23618dbcadcac47b5e003d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90BF 11212 bytes