Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4a8752450e8096…

MALICIOUS

PDF

54.7 KB Created: 2020-08-17 15:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f87c0a956dcc8861bd94d0dfe6ac546 SHA-1: 3d1dfee25ed8640d901ffee844918a615ebe5b79 SHA-256: 3b4a8752450e80968b944c4474b526135ecfcb7a9dab3a2153ccf2d03742df69
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This suggests a social engineering attack aimed at directing users to potentially malicious content or phishing sites. No scripts were extracted from this sample.

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=prince2+foundation+pdf
    • http://files.marryuscaroline.com/uploads/1/3/1/0/131070161/nawebutede.pdf
    • http://files.supervisedvisitationtraining.com/uploads/1/3/1/3/131382346/4486179.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/lidigepetip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/pafejap.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/dadakanizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/demiwalorat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/sezuwarotoraxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/55109436706.pdf
    • https://cdn.shopify.com/s/files/1/0429/3217/5014/files/rederevumefizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1546/files/46308654138.pdf
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/android_studio_rename_class_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/28990295671.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0597/files/thrombocytopenia_treatment.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000832a.bin
cd7df5539bf4baa924f25e738b0824ba045ca95e40930420f44346bf25b22b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832A 4956 bytes
font_01_sfnt_off00009401.bin
317d7fb2dde3211835ad63ef2178ddc48de9d476f30613692a253594ac19eb60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9401 13896 bytes
font_02_sfnt_off0000bffb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFB 4324 bytes

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