Malicious PDF — malware analysis report

Static analysis result for SHA-256 e383e2174078724e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 01:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b17cb654578fa51bba3400bdef8e786 SHA-1: 4fdf72f62b756520fdb1768346df7558b56552f7 SHA-256: e383e2174078724e33ad9db6bae97b2dc50f2154cdc721e29fb3c50791e40f87
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though partially corrupted, includes the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to redirect users to malicious content via the provided link.

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.cc/wb?keyword=perimeter%20word%20problems%20worksheet%20pdf
    • http://files.melaninlaserclinic.com/uploads/1/3/0/8/130874370/gabif-duwupexuweduj.pdf
    • http://files.nelsonmota.com/uploads/1/3/1/4/131412032/5611831.pdf
    • http://files.libbyes.com/uploads/1/3/1/3/131383648/jojuretinexipirilew.pdf
    • http://foruxuli.hoclincolnorders.com/uploads/1/3/0/8/130874359/22103.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/kekinutowutekirapodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/95365700235.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/61194609363.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/tarajotufuxabuzezig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/zigatukinipasopevodibegij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/4108435163.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7897/files/nokiliseviw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/67500051009.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/59814028961.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/tixapalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/jolofanuzexuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/delete_discord_server.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_off000065f6.bin
c5844ceff270ec1ee4490c188f45a47edb5b277fb6ef54d5e26e1ef112e9bdd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 5368 bytes
font_01_sfnt_off0000781f.bin
b4b22b2e255e5712a4376f334d4b393d6e7a1039d0e918a8d84df514299ff7ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 10192 bytes

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