Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b72bbebf9c31aa1…

MALICIOUS

PDF

47.0 KB Created: 2020-08-06 07:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 063805904d2c78162e9c65c406eac074 SHA-1: 972726353eaeefe0a10db92209b4baff8c76e3bf SHA-256: 3b72bbebf9c31aa1d7fda972eee0724cd5004a60c14551ac8a48cd6fe78a6cbf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=aspergillus+niger+adalah+pdf. This suggests the document is designed to lure users to malicious sites. No scripts were extracted from this sample.

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.ru/pify?keyword=aspergillus+niger+adalah+pdf
    • http://files.whitewavemedical.com/uploads/1/3/0/7/130738803/dedozul.pdf
    • http://files.muskegonrenew.com/uploads/1/3/1/1/131164572/4197e50f76e.pdf
    • http://files.mindraym5.radiologyequipmentstore.com/uploads/1/3/1/4/131438759/sisexiwavax.pdf
    • http://files.onegoverningbody.com/uploads/1/3/1/8/131871740/kerojodiseg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/python_curses_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/sowoxedaregofatew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/pofulopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/croft_syntactic_categories_and_grammatical_relations.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/parifugibawavebanim.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/intermetallic_matrix_composites.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/monogekabixelejilenoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/kukizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/7180249981.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_off0000784a.bin
2aa61ab985f7ffeffb8a9cc9ed5c827d89a393628477c09decebb50c653dfc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 5292 bytes
font_01_sfnt_off00008a45.bin
b5d2fb7cc77de771bb61f2154eac7025c9012ef0580c7a2bb8a82570317ffdaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A45 10784 bytes

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