Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3992a1a5270dbc…

MALICIOUS

PDF

61.7 KB Created: 2020-08-21 22:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dd3b206c758cb5f5be3d5d88b967f8b SHA-1: 6b8400880ac17c38986aec9a0984639bfc916836 SHA-256: ea3992a1a5270dbcff3da0b6db06437d3d339d7d65db1e09f272d99aa40624bd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious content. One of the extracted URLs, 'https://ttraff.ru/pify?keyword=acido+acetico+forma+molecular', is flagged as a known malicious redirector. The document body itself is largely unreadable binary data, but the presence of this malicious link and the link farm heuristic strongly suggest an attempt to lure the user to a harmful destination.

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=acido+acetico+forma+molecular
    • http://files.dignityshouse.org/uploads/1/3/0/9/130969183/bafazegipowenuk-gavope-lufosizu-pevimonali.pdf
    • http://rexox.familyforeveranimalfoundation.org/uploads/1/3/1/4/131483603/padino-vimifusufaf.pdf
    • http://renaza.toprodbassmasters.com/uploads/1/3/1/3/131398405/xanemojag-jumozenugop-kuboligiwi-dasaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5764/files/31149925995.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/87133550682.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/41115812509.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/jafasolosunufimixaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/tokazefetiwijixovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/5094393088.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/business_plan_template_online_shop.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/augusto_monterroso_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/ferudevujurebetemadosi.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_off00009092.bin
2df7928856b6f82e6d27ffe6d62bbc3f31096036c349b4a787a0c48b2ffe096e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9092 4976 bytes
font_01_sfnt_off0000a158.bin
1659b5d8984e6d59b8cb527cff1d21626f7c531d218cc666d9d92b1a017717b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA158 16500 bytes
font_02_sfnt_off0000d34c.bin
3d50f22d3ae6d9a4461c814f81554cc573a3512c555c2f223aedeeaca19cd658		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 16080 bytes

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