Malicious PDF — malware analysis report

Static analysis result for SHA-256 c814c7db5b288575…

MALICIOUS

PDF

126.3 KB Created: 2020-07-30 14:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 882cfd0addf43023f0cc9bc7c21f9cc2 SHA-1: 76fb94da38adafb356e61f1322dc12525f80a0d7 SHA-256: c814c7db5b288575164330878709cce3605bb0dbfe646ab7abe3204a58f2182b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addressed T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also contains a heuristic for a PDF link farm, with numerous links hosted on cdn.shopify.com. The document body is heavily obfuscated, but the presence of these links strongly suggests a phishing or malicious redirection attempt, likely to deliver a second-stage payload.

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=greatest+common+divisor+algorithm+pdf
    • http://files.catninga.com/uploads/1/3/0/8/130813898/cd6a9.pdf
    • http://files.pbadesigngroup.com/uploads/1/3/0/8/130815026/1893215.pdf
    • http://files.deliciousdesignsbysherry.com/uploads/1/3/1/3/131381540/6b1193d6c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7080/files/6448520167.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/69304624465.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0435/5352/1823/files/55645139760.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/ponoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/72604866113.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/pufaluluvebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/99236447737.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/80678846687.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/lesumugis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/62360622095.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/41096781883.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/73541759803.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/jinajexe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ba2.bin
1ba1da2a17e7f89ca23c05a697407255099254985897c9cacaf8780af9b33d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BA2 3852 bytes
font_01_sfnt_off0001894c.bin
796f8d80a3a28c514f7effc99ccd285c85484a300eaa0e27c316dcaf240820e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1894C 5448 bytes
font_02_sfnt_off00019bad.bin
c49cb4f92b963d7aab63cc6ca8f822b229cff151ffaf71e0f8b34c93dc03e20d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BAD 17880 bytes
font_03_sfnt_off0001d45d.bin
9e7ef68b275ea5e2b3dc4251298e0bd24d5e54325992881ebae66ef871c2b8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D45D 16476 bytes

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