Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6632cda0d94cef…

MALICIOUS

PDF

48.5 KB Created: 2020-08-15 03:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dcb7c0b1827ffdc2974c7308a218cca SHA-1: b54e53b877da13ec866c227df3a7b373c25771f7 SHA-256: 9e6632cda0d94cef96e4c978ff18cc3e36a4c1e9f7f42d30368ede4725a87585
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wb?keyword=manorama%20calendar%20june%202018%20pdf`. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external PDF links, many of which are to benign Shopify domains but some point to unknown domains. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests the document may attempt to execute commands, likely to facilitate the download and execution of a second-stage payload from the malicious URL. The document body contains garbled text but includes the malicious URL.

Heuristics 5

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.cc/wb?keyword=manorama%20calendar%20june%202018%20pdf
    • http://files.kmajda.net/uploads/1/3/1/6/131606331/rofetamiwekokove.pdf
    • http://files.firstlutheranricelake.com/uploads/1/3/2/6/132695432/fakibakituxodag.pdf
    • http://files.goodshepherdinoshkosh.com/uploads/1/3/1/0/131069781/mavuxuf.pdf
    • http://files.gyanheilyoga.com/uploads/1/3/2/6/132681460/c8d110b43.pdf
    • http://files.spacegianthelmets.com/uploads/1/3/1/1/131164295/majapanifunomed_zurexusawot.pdf
    • https://cdn.shopify.com/s/files/1/0440/5526/5445/files/vubud.pdf
    • https://cdn.shopify.com/s/files/1/0448/1181/3015/files/27084751687.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/catholic_liturgical_calendar_2018.pdf
    • https://cdn.shopify.com/s/files/1/0436/5149/8142/files/bahara_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/sawedor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/topoxegujowowadubunonotex.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/29114257767.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/powershell_function_parameters.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/sawozez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/nfl_week_1_schedule_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/5981/2254/files/82328233401.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054b2.bin
0a57258d68602470fe57c7bb300e897b88f0ea42a2b1c05c2633c165c16d3a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B2 5724 bytes
font_01_sfnt_off00006813.bin
2920901f9602edad311530cdc6896fb8db6a20d599171dd65d9b6376457098ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 6036 bytes
font_02_sfnt_off00007d83.bin
f60fb6bbbef194adc3b48931377fb4926f0ed633c7ff9950fe9c3a52cee7dee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 9888 bytes
font_03_sfnt_off00009f94.bin
f9bcc7848fa1dd2c29eaa5f628cab9cfef40a5ca191136fcbecaef6133835651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F94 16068 bytes

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