Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f17a315d39886e…

MALICIOUS

PDF

58.5 KB Created: 2020-08-15 14:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a690e9059ad2750a0611975788b8d5c SHA-1: 6a8856ecec300800154b341bd31e04b10008d1b7 SHA-256: 36f17a315d39886e996356e72cd642b667fa2cd7c7ad285b4171210438fcad10
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains a lure to copy/paste commands into a shell, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. It also embeds a link to a known malicious redirector, 'https://ttraff.ru/wb?keyword=install%20grub%20bootloader%20manually', which is likely used to download a secondary payload. The document also functions as a link farm, pointing to numerous external PDFs, with 'https://cdn.shopify.com/s/files/1/0433/9177/8965/files/parebemovek.pdf' being a prominent example. The presence of these elements suggests a social engineering attack aimed at tricking the user into executing malicious commands.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.ru/wb?keyword=install%20grub%20bootloader%20manually
    • http://zanofesu.3dpd.co.za/uploads/1/3/1/4/131407995/2683884.pdf
    • http://files.straleystudios.com/uploads/1/3/0/9/130970009/pigedarukumi.pdf
    • http://files.hubert-music.com/uploads/1/3/1/4/131406811/padusidezi.pdf
    • http://worube.monsieurcreations.com/uploads/1/3/1/6/131607600/68bc488b.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/parebemovek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/72130488028.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/luxedafuraguxixibogamowed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/tinusuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/wabamili.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/gewosuvama.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/49295448698.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/grade_1_piano_sheet_music_pop_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/galemelid.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/bazixojuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/zigurilofatawilan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099c5.bin
3d49db9cf65fe77e0b97dfc930547762aff6ae322a472a90016ff22321921791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C5 5156 bytes
font_01_sfnt_off0000ab2c.bin
8bca0ade054473a65e2d13bcee72bc724e9254652432cabbe754db34878ffbce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2C 10376 bytes
font_02_sfnt_off0000ce9f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 4324 bytes

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