Malicious PDF — malware analysis report

Static analysis result for SHA-256 31afc321b8dfd016…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 22:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba36766ea6ec7848b60f640dc5228bd SHA-1: 0147672468fcc2e5c11a96565d7003aff22c1a35 SHA-256: 31afc321b8dfd0165d9dd58c9705f71a495a8fab2cec461265e8ceab2a199b44
160 Risk Score

Malware Insights

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

The PDF document contains a lure for remote support tools, specifically mentioning TeamViewer. It also features a large number of embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=teamviewer+14++non+commercial, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to TeamViewer and the PDF generation tool, reinforcing the lure.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=teamviewer+14++non+commercial
    • http://files.americancampexperience.com/uploads/1/3/1/3/131381151/wonokimuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/hi3516_default_password.pdf
    • https://cdn.shopify.com/s/files/1/0438/1320/8226/files/pazesok.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/83117944217.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/french_alphabet_letters.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/87145295160.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/traditional_approaches_of_marketing_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/81887873169.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/boxster_buyer_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/drastic_ds_emulator_pokemon_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/63859963947.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/meaning_of_business_administration.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_off0000627a.bin
8836e01743f4b92e2bffc6ed006dbfe34e86a09076eb6bbf3fff68d22d6e2c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 5008 bytes
font_01_sfnt_off00007389.bin
43b59a89de68f3657cb1b580a9d63fb1c7f0a88976362be37be177143214f4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 12636 bytes

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