Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bd4022e0c977cd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-12 10:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae88ed7ca28c2b1706c5d705b6a0666e SHA-1: 0da8f13d44dc5b801f41d7df5c4673bbce8eddc9 SHA-256: 96bd4022e0c977cd1f1a551f338b717f883e9bfebc573382b473a02fa871599b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but the primary malicious link redirects to a known malicious infrastructure. The document body text, while appearing to be about piano sheet music, is likely a lure to disguise the malicious intent. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or redirection attempt.

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.
  • 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://ttraff.com/pify?keyword=abide+with+me+piano+sheet+music+pdf
    • http://files.visualheritageproject.org/uploads/1/3/1/4/131453539/7956f.pdf
    • http://rapupo.janetpumphrey.com/uploads/1/3/1/4/131407668/wifisepomesobu-nomusuvori-xefineweli.pdf
    • http://files.girlindia.co.uk/uploads/1/3/1/4/131437464/7245206.pdf
    • http://files.applelandstation.com/uploads/1/3/0/7/130740073/lesozefimorivel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/54489077510.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/68429033608.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/28747278818.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/85300940348.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/banorefimobazozegojaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/57369223244.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/4645525029.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/lonuzipepazexisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/mevekokekovokanigol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/ataxia_cerebelosa_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/zijapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/mabuwikag.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da9.bin
73822a8617cf2476c6a1715f0f2014149b650c46b79b6f248a62aeddfe5fe41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA9 5488 bytes
font_01_sfnt_off00006042.bin
f2e43a3240b4742e6f02cc44ca3a7fe1bbce55647802da80c858c33564b1d2e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 15356 bytes

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