Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2f99deff044a1f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 19:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aeb8db30be771684dcd217cc4ab6908 SHA-1: 4590e0972946a837b672c81c64925d7510768742 SHA-256: 8a2f99deff044a1f8a7d01fc10558caff00916b524ab3950676b7a6b30b85370
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=basic+computer+hardware+maintenance+pdf, which is also listed as a malicious redirector. This suggests the document is designed to trick users into clicking the link, likely leading to a malicious download or further compromise. 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.ru/pify?keyword=basic+computer+hardware+maintenance+pdf
    • http://danano.awdt.org/uploads/1/3/2/7/132741555/31826281af6b0ae.pdf
    • http://files.yashbangera.com/uploads/1/3/0/7/130738625/83486b04a35.pdf
    • http://files.unveiled-ministries.org/uploads/1/3/2/8/132814241/9432696.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/lakivofex.pdf
    • https://cdn.shopify.com/s/files/1/0443/0397/4556/files/23388707670.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/16518911838.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/75799772564.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/91467797244.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/batadakegatoxuviregeze.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/sajetirajiruzefuxupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/95928035044.pdf
    • https://cdn.shopify.com/s/files/1/0452/6971/3058/files/trastornos_alimenticios_ensayo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/duvunolugaxixipupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/18633829937.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/63623734121.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_off00006865.bin
663c995f76f3e1af7afd57166b3cc02ec359e030e1d4cdfa72438a7ff98c8a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6865 5504 bytes
font_01_sfnt_off00007b06.bin
96b040e08b55c827dc99f2badbdbda504e63467becf4ba39bbeec955bb8bee26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B06 10140 bytes

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