Malicious PDF — malware analysis report

Static analysis result for SHA-256 af656efb0fff0fca…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 10:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5865220a2247e7f2ff8955d16e3e1d9f SHA-1: b4c8d22c9383d7a81badcc87f07929e93b988bd1 SHA-256: af656efb0fff0fca1d62c8f55ef52a0f7a1d93a85e2ef6f3b3674d9e510c01ef
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests a phishing or malware distribution attempt.

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=mathematical+definitions+pdf
    • http://files.islandhillfarm.ca/uploads/1/3/1/1/131164574/robizolu.pdf
    • http://files.worldheritageconsultant.com/uploads/1/3/0/7/130775221/21bbefbd518.pdf
    • http://files.guruacademicadvising.com/uploads/1/3/1/3/131380456/jivazabe.pdf
    • http://files.holistichealthactivation.com/uploads/1/3/1/4/131406520/7827784.pdf
    • http://nopom.whittierhsclassof1964.com/uploads/1/3/2/6/132682646/c91ea00bff.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/savezav.pdf
    • https://cdn.shopify.com/s/files/1/0427/4195/6775/files/nujuver.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/91943082236.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/74731655775.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/10931848822.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/16768376551.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/36647611631.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/bugupepanezuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/minolta_srt_201.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_off0000726b.bin
471bae28da34621c93e46f0d488765614eeb23d9dde6680a7dc813dd3e9a6e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 5304 bytes
font_01_sfnt_off00008463.bin
140b3e8e3efd08234221377702a4aba5343b49cecfcccd4eaf43f7398ac6f564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8463 10176 bytes

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