Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cd5d7b2449dbb0…

MALICIOUS

PDF

45.3 KB Created: 2020-09-06 18:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b909d7119e0e2e80eebe4cb4dbafc5b2 SHA-1: 095eb1a4770f021caa25460f86cb5b4e95bd13e6 SHA-256: b9cd5d7b2449dbb0902c57b7166705ca36c72caea9700cf9e50561881f8a86f4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting a link farm. The primary malicious URL identified is 'https://ttraff.link/wix?keyword=platformio+esp-+idf+tutorial', which is likely used to redirect users to a malicious site. The document body contains obfuscated text and numerous URLs, reinforcing the attack pattern of link-based redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=platformio+esp-+idf+tutorial
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/bilowurajotojovurajonutim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5691/files/uf_salsa_club.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/bitiro.pdf
    • https://static.usrfiles.com/ugd/455f95_dcae02eac2a24ae69e7f6a47dffa5e6e.pdf
    • https://static.usrfiles.com/ugd/469aea_4a49b72d8d624ec28c6f1d064dc229d0.pdf
    • https://static.usrfiles.com/ugd/cd79e3_3a3a2cc2a7f04e3493f386e95f76eeaa.pdf
    • https://static.usrfiles.com/ugd/3f80ec_ca9d715da91e4d5f8f2d174618c57e81.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/75459266170.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/how_to_identify_font_in.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/benipirelamara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/33886235665.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/junewexif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/brother_calling_ringtone_free.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_off00006f97.bin
d70aa748483e201364dfbc00a0a2b79bda9fbe71df66354903159dbfcad75fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 5220 bytes
font_01_sfnt_off0000814b.bin
3c575c9a1f266bd287ac5974805b8455cd3e3d242656b1fa26b622f52868b0a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814B 11728 bytes

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