Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98b0e84aecd5e7d…

MALICIOUS

PDF

37.4 KB Created: 2020-08-05 15:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93876595004877f2b42637faa82e9783 SHA-1: 08aefdaf101d369d76445e3880765bf4a4314768 SHA-256: d98b0e84aecd5e7dcf30c8e3d3034e320cfd310eac726b38437f323950e6429d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', which is likely the ultimate destination for malicious payloads. The document body text, though garbled, contains keywords related to library catalogues, serving as a lure.

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=oxford+bookworms+library+catalogue+pdf
    • http://files.buildingourtomorrow.org/uploads/1/3/0/9/130969059/viloxewazukaf.pdf
    • http://files.indyguerrillafilms.com/uploads/1/3/0/8/130873876/wikixilirujajesekulo.pdf
    • http://files.crossroadscowboy.com/uploads/1/3/1/6/131636632/639941.pdf
    • http://files.creation7t8.co.uk/uploads/1/3/2/7/132740553/314d2608.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/vunarodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/refuvapekafugarepabuzawe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/91267039474.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/16358824412.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/widonamapifejaluvovekijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/45466320034.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/xaliwixox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/xarowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/81288794818.pdf
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/under_the_dome.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/apporter_des_modifications_sur_un_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/21298921993.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/97049145658.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_off00005009.bin
69cf713b264a697a9745dcf20658c6f4b5c96c45a9ae515bc6ba87394de59acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5009 5968 bytes
font_01_sfnt_off00006465.bin
898952f2ff85da63533a3d39b53bad8dbc8a082b158ec59f097b34631bdfa94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 10544 bytes

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