Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b67cda62fa578b…

MALICIOUS

PDF

60.6 KB Created: 2020-07-29 14:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ce77ec08ee63a0330381c75c7b63cb SHA-1: 1d143e203da7eadfcec541933a386e423ebb8c06 SHA-256: f7b67cda62fa578b1e1814e85cd9b388042f9489a003eb212bd0d32b31b88ce0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains text related to 'accounts payable configuration in sap fico pdf', aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounts+payable+configuration+in+sap+fico+pdf
    • http://files.americanautoaircarsales.com/uploads/1/3/1/3/131383892/zevoli-gukekomediliro.pdf
    • http://files.stpatricksrochelle.com/uploads/1/3/1/4/131407704/d2bcef230d2.pdf
    • http://files.penninewalling.co.uk/uploads/1/3/1/4/131407012/lirelakixojibij.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/83892420525.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/fumatutaromem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/radawanuvuvimikonojatef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/1122250705.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/38136999978.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/vemagodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/96017732321.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/95783728143.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/41875766296.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/14549727405.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/pusaxexedifikujujex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/34460001723.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/73379232189.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_off0000af4c.bin
80c2bbd5ea407b894875e4f7d56560841c25df5a43e6991e50e0ea2f5a967f90
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4C 5436 bytes
font_01_sfnt_off0000c1da.bin
551f09d9512362093c4e70bc1e70933e8479648ec4f5edcd656f583e658c7a7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DA 10212 bytes