Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1c6066dce13428…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 10:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f412fed3771d3a842d13e487157171a SHA-1: 4271274d1b4136e918816de9da3cb839cce47699 SHA-256: 9f1c6066dce13428b3ef97a922b74466bf988f2d585c0dba38bedff90b10c9c2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is designed to lure users with keywords like 'windows registry pdf books'. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links, many benign, suggests a link farm or SEO poisoning tactic to obscure the primary 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.com/wix?keyword=windows+registry+pdf+books
    • https://static.usrfiles.com/ugd/dad90e_3d3828b0a94e4918a38bc0e02cf90e92.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ef981763f14e7cb887befc3eb6581d.pdf
    • https://static.usrfiles.com/ugd/4b874d_ea230e61d869439f8b210312fa3bf11c.pdf
    • https://static.usrfiles.com/ugd/c162b3_e75caa21b1a2415d8206eeeb600e8837.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/numeros_criticos_de_una_funcion.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5326/files/gakesokutonuwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/voxozigazerimipiwes.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/resumo_sobre_autismo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/43252562802.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/standing_outside_the_fire_lyrics.pdf
    • https://static.usrfiles.com/ugd/01e791_37f7fda5d41347d1a29c4db03ee1bd04.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c35b01283ff43fba67a4d58f0c6487a.pdf
    • https://static.usrfiles.com/ugd/b8c837_324eabb27b67418593593c50426704ce.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_1e5dd40190d24d01b32463e59f09992f.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_off000071e2.bin
37a053f75f004bd23cfa1d59d95f8baa1392e97e615cba16f10a64d75aa96c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E2 5380 bytes
font_01_sfnt_off0000845e.bin
7128b1d3e89f3bdcb6e298b758c3657b8db945812d7ca1e3fe621ab7b3e3d58e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845E 10052 bytes

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