Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1026f56d194f09…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 22:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 480b3b17233e9d015f85ff6453ab5af8 SHA-1: 1f1b87263cde4403b34651b7de5704d15f842c38 SHA-256: cd1026f56d194f096e557d797404deefd23558c89ec754423f5d769a21370dd4
120 Risk Score

Malware Insights

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

The PDF file was flagged as a malicious redirector and a link farm. It contains numerous embedded URLs, with the primary malicious URL being ttraff.ru. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination for the user. The presence of many links points towards a strategy to broaden the attack surface or obscure the final malicious destination.

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=la+main+maupassant+analyse
    • https://static.usrfiles.com/ugd/4d6844_8eb61085c55a43f2b4418650176c5958.pdf
    • https://static.usrfiles.com/ugd/b8c837_68ddddd5a1754db5928c765591c206e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b8b8407d442d7998881b1a0444216.pdf
    • https://static.usrfiles.com/ugd/aff7ca_8f713753204b4641b39ff0a0ebe3ae0f.pdf
    • https://static.usrfiles.com/ugd/de02f3_94f1a6022b9748468bfb99be465f9322.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcb8cec071e747509494258195b98e83.pdf
    • https://static.usrfiles.com/ugd/0dd040_915a80635ae845599a471850c8d459df.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/98912556557.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/physically_based_rendering.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/anabolic_and_catabolic_reactions.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_off00005d97.bin
d5123628533dfc972f2cbfbed276ac790a84c913161e21c4650f2cfdb8ae7ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 4912 bytes
font_01_sfnt_off00006e44.bin
4e91df8a38954e586a10bbf8e3e78f6f2a558b574858a1352c4b32b3f9916fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 9732 bytes

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