Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8d1e8cd60878ac…

MALICIOUS

PDF

46.8 KB Created: 2020-07-27 08:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3510173f6ed84931104aed064c2c9583 SHA-1: 9e09ea8d2de704ba375d714c21762ed42d6c7711 SHA-256: cf8d1e8cd60878acb7ac6f7f9a0df477770c82af2b3f363481f343a32b37f95c
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to financial templates, reinforcing the lure. The primary malicious URL, https://ttraff.ru/pify?keyword=amortization+template+google+sheets, is identified as a redirector to malicious infrastructure. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a coordinated effort to distribute malicious content.

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=amortization+template+google+sheets
    • http://files.blackandblueeaston.com/uploads/1/3/0/8/130873849/d95d23.pdf
    • http://files.lemmarkgarment.com/uploads/1/3/1/0/131070918/raranap.pdf
    • http://files.eastcountyrfc.org/uploads/1/3/2/7/132712057/pigixomar.pdf
    • http://files.heart2artproject.org/uploads/1/3/0/7/130739776/5549158.pdf
    • http://files.mitercontracting.com/uploads/1/3/1/1/131163635/pipopinenete-komisupivug.pdf
    • http://files.mitercontracting.com/uploads/1/3/1/1/131163635/pipopinenete-komisupivu
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/94010742507.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/bupak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/41550107874.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/61244664064.pdf
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/vedezagofivazofepuwosi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2906/0001/files/pubusuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/babugufapakipeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/tujinopefusuzib.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/siwebuguf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/nenokigilomezerikar.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/nalobafujowelibukuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.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_off00007951.bin
5a7d4a06191a3f3e6b6ec439fb57f700cd94e91aff4fce1f328f1a39f6c98289
pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 5060 bytes
font_01_sfnt_off00008a50.bin
40ecc33cf4926359361a70ead6a2cf50848ffbeea75efbfdef58ce302ee81977
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A50 10488 bytes