Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfbbf2b3c555e84…

MALICIOUS

PDF

38.2 KB Created: 2020-08-12 15:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b9909cdfc7c3508a7e882ed270920e SHA-1: 6f0d606846f5bb795517cb910250a582d0187195 SHA-256: 2bfbbf2b3c555e84ae4576b75a3eeeaf410e3210f67314dc045ae8311cec209e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=alejandro+aravena+elemental+book+pdf`. This indicates the document is designed to lure users to malicious infrastructure under the guise of providing a book PDF.

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=alejandro+aravena+elemental+book+pdf
    • http://wipizape.wheelsandteal.com/uploads/1/3/0/7/130775634/19b515bc462d4.pdf
    • http://files.redbearoriginals.com/uploads/1/3/1/1/131164009/62aa2c7a76.pdf
    • http://files.jennifernunweilerrmt.com/uploads/1/3/0/7/130739116/jofine_lirakimoja.pdf
    • https://cdn.shopify.com/s/files/1/0448/4435/1649/files/ritmos_circadianos_humanos.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/569054019.pdf
    • https://cdn.shopify.com/s/files/1/0441/2804/3160/files/ladus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1216/0679/files/romuwemozuwun.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/angioedema_hereditario_y_adquirido.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/puxejedetiporel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4755/8037/files/40738324536.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/vanerevasezigedawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/5113741464.pdf
    • https://cdn.shopify.com/s/files/1/0428/6539/3831/files/10450249448.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/fukipekikag.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_off00005839.bin
c5bb54ff68b095bee4e5d6009c86d0cd4053f41170bc9f5372e9c1d1c06e7e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 5336 bytes
font_01_sfnt_off00006a55.bin
5c606f66e560b7380b89170fa7fafa1fa9c12cdb4e30660552878c8c66a13f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 9940 bytes

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