Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d8455fb4439cbf…

MALICIOUS

PDF

45.2 KB Created: 2020-08-04 15:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7106e85e84a2d70be49f8deb838421 SHA-1: 503759bdcff533988b2adc0318ce7797cb275c56 SHA-256: c6d8455fb4439cbf9642ce8afabe98afc4aa31bc0287c72325c62e3f17995057
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a helpful resource for creating PDF bibliographies. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this malicious intent. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains the URL that is also present in the heuristics and IOCs, reinforcing the lure.

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=comment+faire+une+bibliographie+pdf
    • http://files.tankuanaw.com/uploads/1/3/1/3/131380008/91ffc99b6788bd0.pdf
    • http://files.reiserranch.com/uploads/1/3/1/4/131406068/penuxum.pdf
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • http://files.reiserranch.com/uploads/1/3/1/4/
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/goluwewovupifugogaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/xirezusenupinofusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/53257067744.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/xijazapiwawepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/vazadon.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/5693308511.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/boguzuxuvefigeremosasamak.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/xegofeleko.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/12112398004.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/vurotexezofukimigamijiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/13184892649.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_off00006e28.bin
1e291202160915403370d93c933e8db0553aa85d15fb59a9fe6effbe2309c0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 5320 bytes
font_01_sfnt_off00008009.bin
7e272fcffc4dc25c32cad17a1e9c4a592d48631cd26e9c6b236c93c71f1d7e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8009 11928 bytes

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