Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4eff451ac1be717…

MALICIOUS

PDF

48.7 KB Created: 2020-08-10 16:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 882d8afe1332be81ddf8f49a683bcca5 SHA-1: 342a1eb1e88f5f03395eef7d6501d55386a2056e SHA-256: b4eff451ac1be717022fd84a4715f7f66420daa744032ae6fbeb3ecc0de29764
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=br%25C3%25BCche+dezimalbr%25C3%25BCche+prozente+%25C3%25BCbungen+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous links, including the malicious one, indicates a link farm or redirection tactic to obscure the final malicious 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=br%25C3%25BCche+dezimalbr%25C3%25BCche+prozente+%25C3%25BCbungen+pdf
    • http://files.cpcaannualconference.com/uploads/1/3/1/6/131607075/189e3ce58.pdf
    • http://files.cassandramlambros.net/uploads/1/3/1/6/131637169/sotalovekarofo-famibijanos-xaxetakanudus-savimis.pdf
    • http://files.pikasopetspa.com/uploads/1/3/1/8/131857117/batadapew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/tenefilik.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/zikebaparomugurusemes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/58653643782.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/34053991542.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/kewuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/kinidasumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/44139157928.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/zidevivovezapijakav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/adding_and_subtracting_fractions_games.pdf
    • https://cdn.shopify.com/s/files/1/0439/6436/7006/files/burunep.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_off00007216.bin
64df49978b6669820238b5fbba4b14c0a22415f9fc7b9349e7296f74137744ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 5748 bytes
font_01_sfnt_off00008554.bin
abb1fe540e67273d855809137df2e2ecafcfda9f8567a460f2d4122839e184e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8554 15008 bytes

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