Malicious PDF — malware analysis report

Static analysis result for SHA-256 564c33be1c170b66…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 06:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ac98971fe9b95e6ad951102a4c90fc SHA-1: 164c140989730be1cdd51458b74ddf1786050f9d SHA-256: 564c33be1c170b669e8b508fcfdeb3ad4e32d6537dbb41fd9d9a43ec4b924f26
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, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is a link farm designed to redirect users to malicious infrastructure. The presence of numerous shopify.com URLs suggests an attempt to leverage legitimate hosting for malicious purposes.

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=alkanes+naming+pdf
    • http://files.longocreative.com/uploads/1/3/1/3/131384643/e270bff73d2d765.pdf
    • http://files.musicteachers.london/uploads/1/3/2/3/132302787/rilisoxezarasis.pdf
    • http://files.ballroomdancebyangela.com/uploads/1/3/0/7/130775431/3767440.pdf
    • http://files.thechristianrepository.com/uploads/1/3/0/7/130776239/lululi_vupasililudej_rakuz_lojeduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/html5_flipbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/48984724101.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/dodutuxutugekisujulemulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/tunojiwagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/98305478620.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/sekejumogilamesuxukonomap.pdf
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/guxusobirulidididudodem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/permission_denied_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/xumep.pdf
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/kuragufiwan.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_off000067b9.bin
fa4f20340961ba16935e00367f9586b1469463706d5cc9170a1ca32a8b677023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B9 5316 bytes
font_01_sfnt_off000079c3.bin
6fa540343243a247e992008f33eeffcb79c9d098d335f7d4320c06262c0574cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C3 9664 bytes

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