Malicious PDF — malware analysis report

Static analysis result for SHA-256 a985c8fd847a04b2…

MALICIOUS

PDF

48.7 KB Created: 2020-08-30 10:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffa30ffb5908efd24dbeaf52bf49757a SHA-1: 76abe0647fa9413b095f5a340c4db37a1f7ea75f SHA-256: a985c8fd847a04b247860a27900d4866a3dbc3856f90e85e6af22301c28b04c2
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=list+of+irrational+thoughts', which is likely intended to trick the user into clicking it. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, suggests a link farm designed to improve search engine ranking or distribute 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.cc/wix?keyword=list+of+irrational+thoughts
    • https://static.usrfiles.com/ugd/de3d83_8a567d21b9244a3581dd5a5648418d47.pdf
    • https://static.usrfiles.com/ugd/b5472a_0e5b5d1cdf084223930f8df56ff086b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_21f9a8864bee4d519ff29d43c182de6d.pdf
    • https://static.usrfiles.com/ugd/1b8612_a90b15fe832b45e18d09c0f9fb688507.pdf
    • https://static.usrfiles.com/ugd/40512e_c9da3ffab60a42629af6026233fc1efc.pdf
    • https://static.usrfiles.com/ugd/b8c837_753f2c1b5afd4c9c9d27b27cd23ea9ec.pdf
    • https://static.usrfiles.com/ugd/01e791_fb81163ba58a4066a240ffaa2613dc7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9ecb95da166493db45109e36c10740a.pdf
    • https://cdn.shopify.com/s/files/1/0432/4012/8671/files/45438637029.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/99448735289.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/frp_bypass_apk_para_android_6._0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/24284161325.pdf
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/8343645019.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_off0000764a.bin
e4459e123d01dc835c99a33eb0e5de30f4741ab9bfe836a0f13b5ad14b02ba97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 4732 bytes
font_01_sfnt_off0000863e.bin
d42119d2792f65440a756139c8cf545c12b042f29689e35e2c5a746520d5dbaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863E 9896 bytes
font_02_sfnt_off0000a812.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA812 4324 bytes

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