Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96dd3e43fa539d9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 18:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feefc4e4540b8eb30f68100870e045e9 SHA-1: ac1e4e9acd3e22c8e238b3cac777c57a3d58062a SHA-256: c96dd3e43fa539d929e8a3d68f3f0b1b6abafaa39dc2b9d0ec9987d738331cc8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, redirects to a malicious domain (ttraff.ru) which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=abdominal+pelvic+mri+pdf, suggesting a lure to a fake PDF download page.

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.ru/pify?keyword=abdominal+pelvic+mri+pdf
    • http://bavutiv.bltsnv.org/uploads/1/3/1/1/131163930/c08c3f991.pdf
    • http://files.lilianaduque.com/uploads/1/3/1/8/131856672/2390272.pdf
    • http://files.usedflypress.com/uploads/1/3/1/4/131406610/nuzomamexisebe-lapuwiruxifir.pdf
    • http://xikom.strongerlife.org/uploads/1/3/1/4/131453416/nikapimemuvisi_nofojeva_mogesatonen_kadeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/2692/3172/files/tableau_public_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/janopirozozugogad.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/zaxov.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/georgiana_duchess_of_devonshire_amanda_foreman.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/c_convert_xml_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/50945547989.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/53414719764.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/949540652.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/19046393802.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/bikorilibivomobiwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/ios_10._4_beta.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_off00006b03.bin
0051a9bbacec4a764ec9e2eb2e02fe5070836e02ff34b7e635e15a45a4743df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B03 5312 bytes
font_01_sfnt_off00007cfe.bin
1e142773deafc336e460f4897777637b5a87664360c7f9ff92d77aa1253e3da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 9944 bytes

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