Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f66be1548ca4f9…

MALICIOUS

PDF

56.9 KB Created: 2020-08-31 03:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b01330dd2eb5ad21d079fb74f7f877 SHA-1: ecd50762edeb018722b212b7c7395c31b553762e SHA-256: 54f66be1548ca4f98fb5c020181e98d26dc78fe175f3c786a7cbbaf4eda7f18e
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector at 'https://ttraff.com/wix?keyword=historia+de+las+funciones+trigonomet'. The document body, though heavily obfuscated, contains text related to trigonometric functions, likely serving as a lure. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Heuristics 3

  • 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.
  • 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/wix?keyword=historia+de+las+funciones+trigonomet
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/tojajedukegiju.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/23786662697.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/43637091696.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/23381372500.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/43649507554.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/95126197276.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/numbers_1_20_in_english_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/vonis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/fenavariweverisan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/nunum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/93204387316.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/modern_interior_design_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/2579121880.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_off00007e53.bin
606a60a3083119318ffdccd6581ee66928faf9366ce489f70a47863f6dd2dca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E53 5300 bytes
font_01_sfnt_off00009038.bin
93d87ece508ff3a83365af421f547371d37e9a2c9df3b0a9bd7382067896fa26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 15392 bytes
font_02_sfnt_off0000bff6.bin
1396562ca3b520584892f4bd50ff39b0722e014cdbc1625119a677b71e1270af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF6 16064 bytes

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