Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27122d3161fb7f5…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 14:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd036ef3f5798718509c72befdfdf096 SHA-1: d4e23aa11b9029d61e852c7e03fbe38f1f0929e3 SHA-256: e27122d3161fb7f5a56c32a3d7d6baa47763cd272b8fdf6c0afe7b3b5b21954a
150 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'. The document body also contains this URL, suggesting a lure for free templates to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=free+adobe+after+effects+templates+slideshow
    • http://latesa.sandiegosuzukiinstitute.com/uploads/1/3/0/7/130738720/gotawosugudi-mizobigape-fukixiju.pdf
    • http://didav.otsegoinstitute.org/uploads/1/3/1/8/131856877/nuzeruwizurojabibugi.pdf
    • http://kexada.littlespiritbeads.com/uploads/1/3/2/3/132302782/legumupi-bikumabez.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/poxanilir.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/plague_inc_bio_weapon_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/anglicanism_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/12430829609.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/b_tech_information_technology_uj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/sigominobiniwagulidavafox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/22970778588.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/99035058622.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/zuzikavisibaw.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_off00005ff6.bin
753f3d9ba76bb847de989f78a12c5750b35954d28836cbc764cd989cde4933ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF6 5584 bytes
font_01_sfnt_off000072df.bin
2bf7a3c9bdd3bd6359af66c0481240326c3ab2e129eb2f1b5e4eb59ad1667038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 10156 bytes

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