Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd4a7d2fde1d8e6…

MALICIOUS

PDF

73.2 KB Created: 2020-08-19 06:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 063f6ec246050eef7a658e871b2b8e7e SHA-1: 15bbf51c9f453250280305e0610c153ed6af12be SHA-256: 4cd4a7d2fde1d8e60a32fae487de12b587984c631c3c6b82a8f130a4d48c1b36
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=manual+betoneira+fischer+400+litros'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a lure to external content. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=manual+betoneira+fischer+400+litros
    • http://files.clintweiler.com/uploads/1/3/0/8/130813694/3f3f9e98f8c1ceb.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/wejukupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2564/files/5864284513.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/tax_residency_certificate_usa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/fonewoxoviko.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/fusovinetibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7058/4987/files/rugurovok.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/latuf.pdf
    • https://cdn.shopify.com/s/files/1/0441/2581/4936/files/63090772597.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/gonezezipalerelojimidebem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/mamejekupipofevebawat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1df.bin
d71685d3ce50aeed7d7053842962a04f3586f13ca32a371b6dbdf70c8df03025		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 5224 bytes
font_01_sfnt_off0000d3a0.bin
22f566bcc4ea5fc6d900354c201f92f3288143b9cc831fef349a2669e87eaa5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A0 19248 bytes
font_02_sfnt_off00010a05.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 4324 bytes

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