Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40a7571db335fe3…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 01:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bfa7d9e256a5cc6093d4148f2fa586 SHA-1: 75f8e4b0709298824028f95c55705c7ce1411fdb SHA-256: a40a7571db335fe3b2518f2d6afbe98d0d118c73238159ee0f122d0dd1923c23
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body contains text that appears to be a lure, possibly related to search engine optimization or content farming, which is consistent with the PDF_SEO_LINK_FARM heuristic. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware delivery site.

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=tera+bazz+song++pagalworld.+com
    • http://files.musicforminors2.org/uploads/1/3/1/3/131380591/wiwuketizevisovupone.pdf
    • http://kakoj.placerconservation.com/uploads/1/3/2/3/132302956/sovak_xenetuvukuji.pdf
    • http://lekuvajup.sarahdronfieldproofreader.com/uploads/1/3/0/7/130775795/2028229.pdf
    • http://files.ojrbandmpo.com/uploads/1/3/1/4/131453302/9c1511.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0446/6514/3449/files/calculus_and_analytic_geometry_9th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/22001391890.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/sixemeridadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/9238198408.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/nerapusimobezaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/galanibowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/14567737910.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/25929629531.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_off000057f3.bin
3b75168e9b043c432ee07bc9fe7b55bbb1c2cec3878c3cebc20be68ee9a6b9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F3 5656 bytes
font_01_sfnt_off00006b2f.bin
a46695db02f3ddb671e748601dc033cd0b5cb942ec31f372301aa3bc9f57bb64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 13792 bytes

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