Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2a1763d79b0e28…

MALICIOUS

PDF

40.6 KB Created: 2020-08-20 06:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a45e6b3038cc517e73c92a6b0912066 SHA-1: 31d9e6799a1a42944b2d235c0815bda3c693752d SHA-256: ae2a1763d79b0e287df23e3e68ec12e76343499155fe645aa19e3836db1ef8a5
160 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, including a redirector to 'ttraff.com' which is associated with malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=vpn+phone+free', suggesting a lure for a fake VPN service. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct the user to execute commands, further increasing the risk.

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.com/pify?keyword=vpn+phone+free
    • http://files.ps142m.org/uploads/1/3/1/4/131437530/6377fb0da2.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2265/files/tonawikurisi.pdf
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/lead_acid_battery_chemical_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/23340067992.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/87140399914.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/zuwud.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/pavijupukokigimabigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/70388634816.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/cambridge_exams_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2462/9411/files/bekudonoxazoladide.pdf
    • https://cdn.shopify.com/s/files/1/0436/5906/7550/files/34414282919.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4831/files/85751583617.pdf
    • https://cdn.shopify.com/s/files/1/0447/4263/9765/files/micelles_formation.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_off0000636a.bin
e98b0c3bf3f279267996cccdb972f3741afbd57a43930010bda581729225ffd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 4536 bytes
font_01_sfnt_off000072d1.bin
01744da479724c27f9d7459f8eea36d7b4d8b6df6be1d4fcd385645c63ae65b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10296 bytes

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