Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e7f6917568a33d…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 00:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7887da64a8c36d8808e968bea31e9bd2 SHA-1: 51381539d47b6761f98aad2aa810560060b1f0cf SHA-256: 43e7f6917568a33db42269c41e9783226e83de756a30d6af05136cff8f716cfd
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.cc/pify?keyword=auxiliary+verb+examples+with+answers, is identified as a malicious redirector. The presence of visible command execution instructions suggests the document is designed to exploit user interaction with these links, likely leading to further malicious content or downloads. The document body itself is heavily obfuscated but contains the primary malicious URL.

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.
  • 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
  • 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/pify?keyword=auxiliary+verb+examples+with+answers
    • http://fefejuzu.croptechseed.com/uploads/1/3/0/8/130874153/f2d2639deef277.pdf
    • http://wesebado.katieanastas.com/uploads/1/3/1/8/131856543/bataxi.pdf
    • http://files.glamouraspirit.com/uploads/1/3/1/4/131407424/46ef6071091e9.pdf
    • http://files.wycombeparanormal.com/uploads/1/3/0/8/130814106/janujog-gajijarexo.pdf
    • http://files.surggripper.com/uploads/1/3/2/6/132695575/kafil-tafep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4069/files/rijoripegejekexujujem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/powershell_execute_exe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/xovanaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/latest_system_administrator_interview_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/wolamumuzasugawuxafux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/najezubosaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/rubejijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/68987795330.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/stratiform_and_podiform_deposits.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067cd.bin
4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CD 1684 bytes
font_01_sfnt_off00007031.bin
cfb5525a585be82027b3655635633634eed8d1ab714566afec94bd2cae0a7ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7031 5284 bytes
font_02_sfnt_off0000820c.bin
59e9e6326c777b08e01159207d669bf0299718aa34435403e48d743c8217f06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820C 10340 bytes
font_03_sfnt_off0000a4e7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E7 4324 bytes

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