Malicious PDF — malware analysis report

Static analysis result for SHA-256 266159d6ee582832…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 16:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cfdcb2b7e4fb6dff5d41133f3d385a2 SHA-1: a4fd6a1471e133903c8e172b6f630559d16a4a6b SHA-256: 266159d6ee58283227e62b2cd72fa4ed54d9002dd8f28927e52cc13607dae831
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a 'download button' heuristic further suggests a lure to initiate a malicious download or redirect. The primary attack vector appears to be a phishing attempt leveraging a link to a redirector service.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=b.+m+sharma+physics+pdf
    • http://files.blackrosesdartscharity.com/uploads/1/3/1/8/131871992/jopixuda-wopotijomalodi-piboza.pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • http://files.thestaratstar.com/uploads/1/3/2/6/132681479/puloteluwodewagifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/cholesterol_metabolism_pathway.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/68153997079.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/beethoven_appassionata.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6512/files/survey_of_accounting_4th_edition_edmonds.pdf
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/korin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/87518528234.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/71939890161.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/61590135982.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/85941493404.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_off0000667e.bin
4ecd226a30f8726a15dec9315d76a3d83bb4b0b46a4c39b8bf2008842f47fe91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 5544 bytes
font_01_sfnt_off0000793f.bin
8114a5445f72648861c7fda8737579011c68066f22301be1adf1a5bbaa367bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10192 bytes

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