Malicious PDF — malware analysis report

Static analysis result for SHA-256 22394090e7f7ebc2…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 03:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5607ce020baa3ffd852e9367ca4aad69 SHA-1: 70b33be2dcc0876f9f1ce660d57b94dc669fecec SHA-256: 22394090e7f7ebc21dc8d5a98556523a5983e9e87ff1595dc6d7ba17774161f5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=scholars+junior+english+grammar+and+composition+guide'. This indicates an attempt to redirect the user to potentially harmful content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The file is structured as a PDF, and the presence of multiple embedded links suggests a link farm or redirection strategy.

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=scholars+junior+english+grammar+and+composition+guide
    • http://files.judithgaray.com/uploads/1/3/0/7/130740193/62d30395e6ffb47.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/cetuximab_head_and_neck_cancer_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/manualidades_de_navidades_recicladas.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/quality_assurance_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0462/7736/1813/files/pipojuxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0424/files/83427827554.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/dusepoxupow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/finusilojufuzef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/annotated_bibliography_example_apa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/xofujiweseximejeror.pdf
    • https://cdn.shopify.com/s/files/1/0428/7165/2508/files/cours_allemand_b1_pdf_gratuit.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_off00004eb0.bin
52167c97fb3c016d782033552714636ae5758c8e35fc5c8707fc72f5d594325f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB0 5664 bytes
font_01_sfnt_off000061c6.bin
3788c6b2d90cd189ac46d26598333da514a6f9cd5dc195b79a9038de82c78af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 9900 bytes

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