Malicious PDF — malware analysis report

Static analysis result for SHA-256 5103b8ec812ec6c3…

MALICIOUS

PDF

34.9 KB Created: 2020-08-18 20:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9db8d268fa78a3c5ae3413e43f8d7f SHA-1: 860cacfebef1a0809fed1bead6366ac70c16bf33 SHA-256: 5103b8ec812ec6c389d14d5dc026438da80ac982a5d403996c24166be708131f
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is disguised as an English placement test. The document also functions as a link farm, pointing to numerous other PDFs hosted on Shopify. The primary malicious intent appears to be redirecting users to potentially harmful content via the ttraff.com URL.

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=advanced+english+placement+test+with+answers
    • http://files.kesselaarbv.com/uploads/1/3/1/4/131437425/1882264.pdf
    • http://files.ruthbeachink.com/uploads/1/3/0/7/130738894/dudobawataze-lorajodu-selimofafelamum.pdf
    • http://files.nelsonkimeofficial.com/uploads/1/3/0/7/130738740/rexojoforeniz-wevakol-wovibefamemib.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/chopai_sahib_path_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/xonesukefigivovufafununus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/les_articles_definis_indefinis_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/homebrew_update_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/78036104497.pdf
    • https://cdn.shopify.com/s/files/1/0446/7628/4569/files/map_of_usa_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/gujuromozuwivuxigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/nesogufemunusezeresufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/timomizufejuxerutab.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/fanoposomerewipibi.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_off00004a21.bin
2914e75f4812602e28e1d5253536e33c028f5acd3ff2f2a8bed5ecf31e6e7e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A21 5628 bytes
font_01_sfnt_off00005d2c.bin
bc6af630bae7d9d2fd58d38fbef654d480062f0d1b5652ecd8d01566d80a3daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2C 9904 bytes

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