Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fad21e2cba7241a…

MALICIOUS

PDF

67.8 KB Created: 2020-08-20 00:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ac3f51bbd4431187d0e26a7b8c0f386 SHA-1: 928adb843cfa8b8c06af6fa222a6dfb35c1bb7df SHA-256: 8fad21e2cba7241a2fc08932ec2bc2ad9941c7d10aea607e7d3fa284dc6d9389
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the text "Potential form kaimasu" and the malicious URL https://ttraff.com/pify?keyword=potential+form+kaimasu. This suggests a phishing or scam attempt to redirect the user to malicious content. No scripts were extracted from this sample.

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/pify?keyword=potential+form+kaimasu
    • http://files.livebeyondthelens.com/uploads/1/3/1/4/131452836/4022694.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/46816690612.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/73618745998.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/log4j_maven_dependency.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/cateterismo_vesical_femenino.pdf
    • https://cdn.shopify.com/s/files/1/0439/5896/0286/files/aromatic_hydrocarbons_chemguide.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/adjoining_precincts_form.pdf
    • https://cdn.shopify.com/s/files/1/0436/8252/9445/files/luxiwufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/countdown_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/73238126408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/vawedinel.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d3b1.bin
2df47511c410956a24fb49494866a39d684d78e7e7741c117662370cc9d7a50b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD3B1 18480 bytes
font_00_sfnt_off00005d5a.bin
718f29d35fe6678a608f65064f0c81c8c4692421311531f1d4d5275a73f7a89c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 7808 bytes
font_01_sfnt_off000077d0.bin
3fb5ff23f0875753ae00ee49664393fc8528830a12cec9049fd9fb67c7c8ef90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D0 4860 bytes
font_02_sfnt_off0000882b.bin
a20778ffb9ebf7a1880647bb65e38b149a0a661c86f0bc592edd4a65f4320911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882B 7004 bytes
font_03_sfnt_off00009b1d.bin
d171260a64fec5fa325153b3d630c9b71e6a21f10721513f3ec580d13bdb6971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1D 18776 bytes
font_05_sfnt_off0000f13e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 4324 bytes

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