Malicious PDF — malware analysis report

Static analysis result for SHA-256 90db545d194581ea…

MALICIOUS

PDF

45.7 KB Created: 2020-08-05 04:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56ef837163503530094ebc70119f1934 SHA-1: c09131cda41d47d46b95573e373b5ea1d55122ea SHA-256: 90db545d194581eafe53b7716c4184d42e3aa3e3feabaed1fa9e4d093c03252c
120 Risk Score

Malware Insights

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

The PDF file was identified as a malicious redirector, containing a mass external PDF link farm. The primary malicious URL is 'https://ttraff.cc/pify?keyword=polymerization+mechanism+pdf', which likely serves as a gateway to further malicious content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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.cc/pify?keyword=polymerization+mechanism+pdf
    • http://files.perfectlypixelesque.com/uploads/1/3/1/4/131438604/1a677ef1.pdf
    • http://xolud.mjankauski.com/uploads/1/3/1/4/131407552/5518478.pdf
    • http://nexefuvuk.z-furniture.com/uploads/1/3/1/6/131607062/fonipuzif.pdf
    • http://files.youthactionmemphis.com/uploads/1/3/1/0/131070178/41ccea.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/wupuzumebisox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38030937597.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/astronomy_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9501/files/16227859894.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/javascript_uncheck_checkbox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budexojimomamuzarumedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/49562203108.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/nujoxogojutonigox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/97716216262.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/wuxedurupaduru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.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_off00007557.bin
4b42ca2e1550a105767fa5ba2fb35a6520baf8772c46b2bd5aecebea02a0195c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 5548 bytes
font_01_sfnt_off00008816.bin
ae3c3f7db4618fc42616fc9e5a69457b484c0406456f2ec819e9ff16e8568380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 9916 bytes

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