Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1980bd28c253c72…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 01:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5540b48015ba4f13d0b6a1987f2653e5 SHA-1: 9ab8df274ef2f5516592ec22c219086ded72aed3 SHA-256: d1980bd28c253c727d38dbd45b0bdc500509ea86645dc5ad024043738f756ea5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with 28 external PDF links identified. One critical heuristic indicates these links are part of a link farm, likely for SEO manipulation. Another critical heuristic flags a link to a known malicious redirector. The document body contains obfuscated text and a URL that appears to be part of the link farm. No scripts were extracted, limiting the analysis of direct malicious actions.

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=buttercups+uniform+discount+code
    • http://files.rtvaden.com/uploads/1/3/1/3/131398555/perivisixom-kefowuginaz.pdf
    • http://guwuzoji.dknightwesmedia.com/uploads/1/3/2/8/132814930/973afbbf59f4a.pdf
    • http://files.savethecourthouseclock.com/uploads/1/3/1/4/131406412/kemotinewo_poletegup.pdf
    • http://files.jasonowencues.com/uploads/1/3/0/9/130969080/firobuporobizub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/bivevova.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/larubetebotutir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/81274254674.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/fire_emblem_the_binding_blade_rom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/xegutenoxufoparevekonan.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/role_and_function_of_central_bank.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/jofebuzalevuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/votopali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/gifugiguzutewezubis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535b.bin
f8d2febb1f0fb9578d64c0a337d1bd765f6e69f1ed2102e5621bde709e09c399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535B 4992 bytes
font_01_sfnt_off0000643d.bin
6418b79c2ab151245965c827d5014391ace80a922459ff48b09b672fd57068b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643D 10460 bytes
font_02_sfnt_off000087e8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E8 4324 bytes

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