Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfdb7504d0907bd…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 05:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c04d9bd74b0a34ebae6fea3f0ecdce9 SHA-1: f25035ed7014227933be245b7baed45e5cfc76a5 SHA-256: cbfdb7504d0907bdf99ef811e0d56a67b2a6deaff7fd8c696d455b07d9a53be6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely to improve search engine ranking and lure unsuspecting users. The primary malicious URL is https://ttraff.cc/wix?keyword=contoh+dokumen+andalalin+pdf, which is presented to the user as a document link.

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=contoh+dokumen+andalalin+pdf
    • https://static.usrfiles.com/ugd/2e16aa_0690fd2a378f4fb988b086f096bd79b2.pdf
    • https://static.usrfiles.com/ugd/9b33c5_08e7f04dcb5b414aaf798cfcd3d51e7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdc77f2aa0844d95be48d2cfbe874bbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_080dccfeb0af425a81cff814dfa737ab.pdf
    • https://static.usrfiles.com/ugd/c5d40f_b0c8fd1a0a714f29829c4bb2bb345c23.pdf
    • https://static.usrfiles.com/ugd/493135_8f73c1dd2f264f54b5d48d354ba4a2a7.pdf
    • https://static.usrfiles.com/ugd/ae059d_f51febff85b243f4b8be530868f8e1ea.pdf
    • https://static.usrfiles.com/ugd/d2751c_d256305ece534334b639907ec0b9ca7f.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_2831ae6c73ec446e92262a184df8fecf.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.pdf
    • https://static.usrfiles.com/ugd/b8c837_6542bf75d93e4f9884e5f9a695438c2a.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/47687609333.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/81266204740.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/miller_syncrowave_350.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_off00005502.bin
105ff8d33a0014319c8eb9cd3ccb0bdfd31da28424abf8572aee39ff6cad9eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5502 4976 bytes
font_01_sfnt_off000065c6.bin
a4f83a77d2ab7dc91a6a07b8840fc3ca3b1f04cc3cc9286c6f878eaf67538cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C6 10008 bytes

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