Malicious PDF — malware analysis report

Static analysis result for SHA-256 36121cc3bbc0b8ce…

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 04:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817b2e90c2536bc18d4bcb824f3a938d SHA-1: 182ff91a750168121eb93cee14f90d5a224a895c SHA-256: 36121cc3bbc0b8cefd4d2ab7668e0e7623cd9d6fe2e1251ea1230f44c1368cd0
120 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDFs, with one primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains the same keywords as the redirector URL, suggesting a lure. The PDF is designed to lead the user to the malicious URL, likely for further exploitation or phishing.

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/wix?keyword=expanded+metal+sheet+copper
    • https://static.usrfiles.com/ugd/fe83c3_72ff0401194645408938e13b37f132a8.pdf
    • https://static.usrfiles.com/ugd/65b209_d61de1331f6a4dcfafa5db713bc0f364.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdfa90182a5d4bc28e25f13ed5d7ec77.pdf
    • https://static.usrfiles.com/ugd/accd1f_cacf2ef71f8c4e82b0ca06256468ef62.pdf
    • https://static.usrfiles.com/ugd/fbccce_d578762edcbf4709be5267e6d2a7dbc6.pdf
    • https://static.usrfiles.com/ugd/136d07_80802f65c4974dc58953cc1c29e571e2.pdf
    • https://static.usrfiles.com/ugd/77941b_263483191225456895f75d6a1c9334a5.pdf
    • https://static.usrfiles.com/ugd/b7306e_3ec5576a21f5470fb2c913d6c2ceb008.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2e180409194f98bff96c534e57243b.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/rofuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/39159518145.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_off0000634f.bin
97e8e96752be604c0fc80768d0a9a324e6dc58de588cd60919a2d28b8edd7c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5340 bytes
font_01_sfnt_off0000754d.bin
bac52abbc292d9feb96f5fef79d3042f5a1a2a2ee2846dde11dd1529f606a332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754D 10456 bytes

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