Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbfceebbcf3cca7…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 00:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57996836dcfe438e8f4953b82dbe7e89 SHA-1: 06ed3057d57599074d8b83a77a7735c211d6a601 SHA-256: fdbfceebbcf3cca7fffa9b25832bf294664e25b77770d27ce298de7b3ccee440
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=freemake+audio+converter+offline+installer'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a link to a PDF hosted on cdn.shopify.com, suggesting a lure for users seeking software. No scripts were extracted from this sample.

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=freemake+audio+converter+offline+installer
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/jexufakaroxemoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/55907145745.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/972_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0446/3312/9123/files/normatividad_de_las_camaras_de_comercio.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/goleniladosakava.pdf
    • https://static.usrfiles.com/ugd/b4609a_8e786c8df99241edb72d222f486b4709.pdf
    • https://static.usrfiles.com/ugd/b8c837_e334b50ff0814d4296a42551ef71dad4.pdf
    • https://static.usrfiles.com/ugd/1e32c2_7ebe840b2c2a4ef69212c673bf83e264.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/81802354115.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/vojukiv.pdf
    • https://static.usrfiles.com/ugd/362633_ee87567e3cc0438aa247ab46644f932f.pdf
    • https://static.usrfiles.com/ugd/03ae60_a95dc61a3f7944e2957c07a612e317a5.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_off0000614b.bin
3ddf7ad4bd12d11b294710ea8acba254ed8a9174e7fc059a03e9fb8857de7488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 5128 bytes
font_01_sfnt_off000072a8.bin
b2d5885462f491d59f3fd9d8e761e55d2b3775a85e8ac6f7977b662950e0ebab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A8 10364 bytes
font_02_sfnt_off000095ec.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95EC 4324 bytes

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