Malicious PDF — malware analysis report

Static analysis result for SHA-256 caded07d3a8e7ea8…

MALICIOUS

PDF

40.9 KB Created: 2020-09-02 02:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5428eb71a1c48dc1dd68df102cb29586 SHA-1: 320a35877917494837c942b73569a82ddf911c83 SHA-256: caded07d3a8e7ea8960ec254635327b71b717206332581a1d04bc302e71a08f1
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=binder+motor+brake+manual', is likely intended to lead the user to a malicious site. The PDF also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. The overall purpose appears to be social engineering through a deceptive 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=binder+motor+brake+manual
    • https://static.usrfiles.com/ugd/4f92c1_25b6c7a91fd44d6585abe939fa12a859.pdf
    • https://static.usrfiles.com/ugd/a01749_0bc604ffe7d94d19b35365a4904ba7ea.pdf
    • https://static.usrfiles.com/ugd/a640e9_b838eb3e24e94a489db2a04610dd3629.pdf
    • https://static.usrfiles.com/ugd/74a852_fb41c2c07db24088a322d7a2dffc995e.pdf
    • https://static.usrfiles.com/ugd/5ad03d_fa4e0e8f3d924a148631991ac076793e.pdf
    • https://static.usrfiles.com/ugd/33c377_d8eb4198c0f64d879e15ee01674d9a77.pdf
    • https://static.usrfiles.com/ugd/9dda13_9e2c8515c5e14d55be889caa89f1eaf1.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_a48b2795de5f4524a1b9716db85661fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_01abae187c814641bd7c5b67a3d3278f.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_82b747d6eb0a41408e1ab06ce5fa9c00.pdf
    • https://static.usrfiles.com/ugd/d017d5_ac73cd54ddb945b9a3e2629a48f0a3bb.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_0cb8e7f369e2484f8b411dc8c12b8c00.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/65645591747.pdf
    • https://cdn.shopify.com/s/files/1/0440/1732/0094/files/sivasavewi.pdf
    • https://cdn.shopify.com/s/files/1/0452/5893/2381/files/walibuzunidigakunav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/80405049608.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_off00006343.bin
8b43a85928b348e6a243273fe3b738e9516333f367087d6baa74f967f9dc4d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 5044 bytes
font_01_sfnt_off00007450.bin
74c1dbcc6fe63e02332a1214ebec95a6f5c8c3c7015510804a6b19b8614e42e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 9996 bytes

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