Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c15251a796b3cd…

MALICIOUS

PDF

40.1 KB Created: 2020-08-21 19:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 659e92ee80d2b5292547d7567d725b1e SHA-1: c9849e69c884cbbf7272aa131492032f294bc3d0 SHA-256: f8c15251a796b3cdf6e3fdbb56167dea1fd22c5d235f50d267b2ccb89b014946
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, with numerous embedded links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body contains garbled text but includes the primary malicious URL, reinforcing the redirector's purpose.

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/pify?keyword=handwriting+tracing+worksheets+maker
    • http://files.proamrefs.com/uploads/1/3/1/4/131437932/0c66e9cd408f53a.pdf
    • http://files.evamarieyoga.com/uploads/1/3/1/8/131871518/rawesedemib.pdf
    • http://files.jenaforryaneyoga.com/uploads/1/3/2/3/132303270/pusewuzuboliti.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/kifox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/80292830919.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/fimelebogaxolebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9230/3254/files/26877267348.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/zefoxemuzigivoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/gubanazemixiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6684/1505/files/livros_sobre_auditoria_interna.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/lobajudona.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/78918053207.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/29613650314.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/effect_of_auxin_on_plant_growth.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/14078167669.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_off00005e4c.bin
36341bd51820599abe5837af89ff773ad58a61c4f03b56caeb629e8a2e5b8465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 5440 bytes
font_01_sfnt_off000070ab.bin
e8ad0af16a3592ae73bb6fe5ba37e8cb971d7a64815a789ccffb7d1f1abc1529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 10112 bytes

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