Malicious PDF — malware analysis report

Static analysis result for SHA-256 b144c8918406c1da…

MALICIOUS

PDF

43.5 KB Created: 2020-08-04 23:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e2fc64e7a17c29c4a9b9d79b910213 SHA-1: cd0fc465b96b637711fee884964f7bfc4cb1e407 SHA-256: b144c8918406c1da3988be4168a8256aa52061a752e39c9ca4c7f1e1bf8230b3
160 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mathematical+modelling+notes+pdf, which is likely used to redirect users to malicious content. The presence of a 'LOLBin run command' heuristic suggests that the document may also contain instructions or embedded commands for executing scripts or binaries, 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.
  • 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=mathematical+modelling+notes+pdf
    • http://files.frhistory.com/uploads/1/3/0/7/130775242/203b3fdac6dc1c0.pdf
    • http://files.westhampsteadchristmasmarket.co.uk/uploads/1/3/2/3/132303118/dc4886dadfb812.pdf
    • http://files.martycoulter.com/uploads/1/3/1/4/131483098/802419.pdf
    • http://nitoduza.morehousechicago.com/uploads/1/3/0/7/130775436/moligutotemaretoguto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/26332849745.pdf
    • https://cdn.shopify.com/s/files/1/0437/0877/6600/files/64978926416.pdf
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/wii_u_hacks_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/roxasake.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/lotilapegalej.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/sudemurejar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/kivabuvegujebevan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/7629308242.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/71012289626.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/tn_commercial_drivers_license_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3455/9143/files/cmd_commands_windows_7_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/monitor_audio_bxw10.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/revised_standard_version_catholic_bible.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_off00006b4d.bin
b5b41217afd42dfa37fd749fd5959e53ba3f829c6bc314e7a20e6cb017d5d6f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 5480 bytes
font_01_sfnt_off00007de1.bin
25f2ca459375f74d8e59aecd0603b85c91e54cf22b1ba2e4a5160f6b0601e75d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10240 bytes