Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bef9e5f449d8935…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 13:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dc0ec95ff982f17119ebfe0bec2c3ea SHA-1: 55f95d93731f179707ca4a198859554d9b70e1f2 SHA-256: 8bef9e5f449d893576a7018fc2f28f55fcbe025b99f086ea3ab282d8653f52c3
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about cash flow management. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL, https://ttraff.com/pify?keyword=importance+of+cash+flow+management+pdf, leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. No scripts were extracted from this sample.

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.com/pify?keyword=importance+of+cash+flow+management+pdf
    • http://files.accuratehomeinspections.ca/uploads/1/3/0/7/130740148/5170561.pdf
    • http://files.npiam.org/uploads/1/3/1/3/131384663/3027265.pdf
    • http://files.ashlightfoot.com/uploads/1/3/1/3/131382141/sadogokulikaset.pdf
    • http://files.quiet-mind.co.uk/uploads/1/3/1/3/131379296/maked.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/37676163401.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/92327402369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/a_pocket_style_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/ximalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/pitodibizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/wevikodosunaroberoxumiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/85216454343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/aadhar_card_correction_application_form_download_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/xoraxanodugatilaf.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_off00006d5d.bin
69a7177b386a1e29a54d1e7a2beee01f8bdb56115ff4da4a2d4dfe3fe2cabf05
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5D 5600 bytes
font_01_sfnt_off0000804b.bin
6cac4c06ddb85fe08f18cf9780ed712a62b7c60509f253db476b80edb7bda5f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x804B 10500 bytes