Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef4ef073edb0bca…

MALICIOUS

PDF

34.7 KB Created: 2020-10-09 09:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a806d9c502182e1629a53d2a2146d12a SHA-1: c744418b788c838b4f7ca27b2994733e9adf2ac4 SHA-256: bef4ef073edb0bca846831d655a5acd2225e568ec9a11d90f016894a98eb83d0
152 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDF files, a technique often used for SEO poisoning or to host malicious content. One of the embedded URLs, 'https://ggtraff.ru/strik?keyword=microsoft+toolkit+v2+6.7+download', is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to redirect users to malicious infrastructure, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • 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/strik?keyword=microsoft+toolkit+v2+6.7+download
    • http://mopotum.midbeach.net/uploads/1/3/2/6/132681396/ea7efc90f.pdf
    • http://gilaz.lizacostello.com/uploads/1/3/1/3/131382030/5327796.pdf
    • http://files.turnberrypress.com/uploads/1/3/2/7/132741375/kokovuvadegudotikiko.pdf
    • http://files.musicbyreggie.com/uploads/1/3/1/6/131637034/1156151.pdf
    • http://likozit.envirohealthuk.com/uploads/1/3/0/7/130739640/7b19dc814ef3.pdf
    • http://files.stoecklilager.com/uploads/1/3/2/6/132682905/samimeranajoj_livetimesum.pdf
    • http://files.iaeast-ptia.com/uploads/1/3/2/6/132680949/kenujosisopafub-kokowatibakeg-koxoxuzibu.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/11204526918.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/kafokufarisawav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2390/0565/files/2020_phantom_forces_speed_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/one_in_a_million_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/basalowakotogojogurax.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006428.bin
f4c11c2c83b69fd3d70e13e2271f0d7e6cad4c0ccc0c444fc30f4b7c90eb3689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6428 5636 bytes

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