Malicious PDF — malware analysis report

Static analysis result for SHA-256 850f07e8179c375d…

MALICIOUS

PDF

34.0 KB Created: 2020-08-22 02:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc24b186e3359ad43ca99aa99016fc2d SHA-1: bd96f8d4660ce582a220e1e32436b1697d983d5b SHA-256: 850f07e8179c375d8e4e46c636d28bebc84e5fdc15e634b554d483ce884dffe4
160 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also exhibits characteristics of a PDF link farm, with numerous embedded links, as flagged by PDF_SEO_LINK_FARM. The document body and embedded links suggest a lure related to 'sheet music' to entice clicks. The SE_PASSWORD_ARCHIVE_LURE heuristic indicates that the document may be part of a multi-stage attack involving password-protected archives.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=blackbird+beatles+guitar+sheet+music+free
    • http://files.dancingbearproductions.net/uploads/1/3/1/6/131606393/7443028.pdf
    • http://files.mightymustangband.com/uploads/1/3/0/8/130814758/a5035574b0d614.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/33042328465.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/kizidurarixivadeguni.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/nivawogat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/40205123465.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/47494622888.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/fozofupakogovevikutirofaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/32464933804.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/luvof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/kogetizoverugipezolow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/43543238887.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/acofp_inservice_exam.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_off00004446.bin
2beb3eff5f10f9470d311753b9cdc734426391f343f46e36abb0f1c22ba7c422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4446 5688 bytes
font_01_sfnt_off0000577b.bin
ef232a44ed72fe933c3e1620825aa67b74ace4ad6f7f0f832d357308b1d8bb53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577B 10388 bytes

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