Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba912f0d3a5db1b…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 12:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ee2678e880796221f9336a0d46d9e74 SHA-1: 0206a36013fbfec0110f8210783bf3b09548cb21 SHA-256: 8ba912f0d3a5db1b0a567f1789f89c5d4b18d69ac9f1de95b86cb86a5dfb97a9
176 Risk Score

Malware Insights

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

The PDF contains embedded links and document body text that lure the user into downloading a remote support tool, specifically mentioning 'Ammyy admin'. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=ammyy+admin+3.+5+for+mac+os', is flagged as malicious and likely serves as a redirector to further malicious content. The document also contains a mass external PDF link farm, with one of the linked PDFs hosted on 'http://files.mrsreid3rdgrade.com/', which is currently unknown.

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=ammyy+admin+3.+5+for+mac+os
    • http://files.mrsreid3rdgrade.com/uploads/1/3/1/4/131406086/nazime_zodaxigekivuroj_rotomifowerunu_nejugawufazed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/52383231180.pdf
    • https://cdn.shopify.com/s/files/1/0450/8735/9141/files/14852622279.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/alien_swarm_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/linetunajawadavipenal.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/56975465856.pdf
    • https://cdn.shopify.com/s/files/1/0435/7164/2527/files/79719075619.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/dekeboriv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/pufevatafug.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/19291418788.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/71974829369.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/15070342871.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_off000057b4.bin
41f0cfb1b9e5aa8e33ec6f32bb9e7e6709169f7a47314b00a04036643e5d9c87
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B4 5544 bytes
font_01_sfnt_off00006a82.bin
0afa52ef7754b806875fcb5469a21e2bd43fa92387fe0d778d27e58456bfff69
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 10360 bytes