Malicious PDF — malware analysis report

Static analysis result for SHA-256 87421b431f4605bc…

MALICIOUS

PDF

42.6 KB Created: 2020-09-14 09:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ebb1b508a6db498fe4966a91abf563 SHA-1: acfd5f75430ccad49828e0d6c6ed145057c7d2ba SHA-256: 87421b431f4605bc6d0edd5f003d935ae090f6faad89a28151b698a64b620d23
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many pointing to benign content, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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/wb?keyword=deep%20sleep%20trilogy%20unblocked
    • https://static.usrfiles.com/ugd/0d2908_d85ce2417a4141ff916d2d67d0db5e05.pdf
    • https://static.usrfiles.com/ugd/143c98_ba16c2f3fcc74406a9d0b8c350689e72.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ed7c86f51f40f9bb87f3ded3b0521a.pdf
    • https://static.usrfiles.com/ugd/111c46_9c55d974a9294bedab1d54b224039076.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f776df66d0d40f7ade6c47fe730638f.pdf
    • https://static.usrfiles.com/ugd/97aff7_6cf90f5209f54d5fb87facdffe5c1172.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/cocktail_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/construction_risk_assessment_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/tipidaranitufozije.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/cfa_level_2_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/powevaligerodirikep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/curso_de_ingles_iniciante.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_off00005b8a.bin
2dd272038cd6b656f0f62ba14b6dc5ea5becd91194c75a9bec06d899972723fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8A 5216 bytes
font_01_sfnt_off00006d60.bin
22a79409134c4b82aad862b3e249b80827da6792145be5b9be1931b4e671b210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 9932 bytes
font_02_sfnt_off00008f69.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 4324 bytes

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