Malicious PDF — malware analysis report

Static analysis result for SHA-256 d284489a5f814c3e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-27 22:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7143d017b1af14032d8d19199d713d4a SHA-1: fac19c91d1e419d030fbd54825e25cf1e17ac7c6 SHA-256: d284489a5f814c3e0f0b24639690585f7e02f0367fb57449c3c377413bc6d71c
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This link is presented as a download for an ebook, leveraging the SE_DOWNLOAD_BUTTON heuristic. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=the+cell+a+molecular+approach+8th+edition+ebook
    • http://xewit.shueyvillechurch.org/uploads/1/3/1/4/131406515/8159955.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/mofudexuwuropabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/90756745337.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/law_on_obligations_and_contracts_soriano.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/difference_between_sarcoma_and_carcinoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/startup_costs_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/panozilava.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/18746866964.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/meridif.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8498/files/beginning_xml_with_c_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/lezugijamifabozofa.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_off00005e83.bin
36d719216055e932a8a3ed5686bf03e8d23a268ab6960f86840d9c1b269bd9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E83 5480 bytes
font_01_sfnt_off000070f9.bin
251e75ac11140e895c43d35184ee93ac8888714410e7d9b893ebf6ca2de93b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F9 10356 bytes

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