Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd5ca741dd55570…

MALICIOUS

PDF

75.2 KB Created: 2020-07-30 09:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7afaac8901f3b51b56d013dbd61579a SHA-1: 2680d6e73b5178acc5a5a7b2bde39d7db2ad7bbd SHA-256: dcd5ca741dd55570e651cde6c2a0b3a2a09e25fe5620d0fb0d6091f85bf11448
142 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com, which is a known malicious domain. Additionally, it exhibits a PDF link farm heuristic, suggesting it's part of a larger SEO poisoning or link distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple embedded URLs, some pointing to Shopify domains and others to various file-hosting sites, further supports the attack pattern of redirecting users to potentially harmful 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=dell+r740xd+specs+pdf
    • http://files.frankcowanlightwriting.com/uploads/1/3/0/7/130740077/fewerutigax.pdf
    • http://files.teach101.net/uploads/1/3/1/3/131384145/vuxurolixivij.pdf
    • http://files.legendedge.org/uploads/1/3/1/4/131453156/takuse.pdf
    • http://files.r-ewolucje.com/uploads/1/3/1/3/131383942/pavavegovogora.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/47276809856.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/25967787296.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/40410453709.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/90222386911.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6901/files/lofebegujuxodape.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/79848593940.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/39619027958.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/berimijitopuzopef.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/17852520024.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/41618099534.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/63627274189.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/19070617204.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/
    • https://cdn.shopify.com/s/files/1/0433

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d266.bin
9a939887348ede7453d9c4f22aeb588c74407ebfeafe5e28f12a90d39e289cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 3548 bytes
font_01_sfnt_off0000df1a.bin
c062e227f39618604a0dc7ae2026e27f153f69494699b8558a66315fb1cc6329		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 4760 bytes
font_02_sfnt_off0000ef69.bin
82fc0372cffe9cba18650c3519c9fcffc0002182c05be56b7335d2ce6317e2eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 15472 bytes

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