Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef48437e06728c10…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 10:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a8228c65b6e1abcc57394e5d05c680a SHA-1: 879cac3dcaa78e7caa39aa55449de4ff6c2ce579 SHA-256: ef48437e06728c1096e585b8a29c82ee228429b2f2bc967e8b174b021cb805c5
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, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=free+spelling+test+template+10+words', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to lure users into clicking malicious links.

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=free+spelling+test+template+10+words
    • http://files.midwaytacticalgear.com/uploads/1/3/1/6/131607440/jusipazom.pdf
    • http://jovozo.maenad-films.com/uploads/1/3/0/8/130813478/1327599.pdf
    • http://files.shantellstricklanddavis.com/uploads/1/3/2/6/132695492/7880082.pdf
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/85480564557.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/modern_embroidery_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0448/0227/7542/files/76999573524.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/45044870165.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/lakabupigumopejuje.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/azitromicina_solucao_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/guxaraxamobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/57469662958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/65299115017.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_off00005dd6.bin
642e5769bcc3dec8a5b09c2f97113a9c8d174fe1aa907609b86a4e0c0dcce7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 5520 bytes
font_01_sfnt_off00007092.bin
a2fdda904838f865bd300aa4ede14e93281c909f35b570dcc1fd5b47cf2e8b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7092 9780 bytes

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