Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dc44e4a1dcfe17…

MALICIOUS

PDF

35.1 KB Created: 2020-08-03 08:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0b7022a0bbf784b9501960157b7f76 SHA-1: defcc4e068a21f1669955ec1716f595c138f0544 SHA-256: 27dc44e4a1dcfe171fa6834bd3b59a48b8de3daaeb41b7215c97f3b4fccd6d36
120 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a notification about recent activity. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL, https://ttraff.cc/pify?keyword=my+recent+activity, leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with the primary one being to a Shopify domain, suggesting a link farm used for SEO poisoning or to host further malicious content. No scripts were extracted, but the presence of these links strongly suggests a phishing or redirection attack.

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.cc/pify?keyword=my+recent+activity
    • http://files.catherinehedrich.com/uploads/1/3/2/3/132303230/6c91025b5902.pdf
    • http://vafazulaz.cavumcloud.com/uploads/1/3/1/8/131872225/litekutezi_semuvigasovena_lamidegesira_vezijokurolenam.pdf
    • http://files.aquaticclub.org/uploads/1/3/1/4/131453194/5988597.pdf
    • http://files.scuttsdrivingacademy.com/uploads/1/3/1/4/131453990/vajalisolore.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/wogaxavimufenalejenavufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/98091236380.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/69924800537.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/52581582297.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/wukelinujudid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/nadesetaxagevepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/vokarup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/7054751498.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/bilutuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/32783371022.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_off00004ec2.bin
ff1a2a0a6039fbe40293c4743a2d3a9d903c6b7bfedfa0254b0592853da7b8f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC2 4748 bytes
font_01_sfnt_off00005f0e.bin
a4f8abd104743cd54fc22ed101fd964758b22fdfffb02a1146c75477507a878a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 9664 bytes

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