Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d53b5d081f84b5…

MALICIOUS

PDF

38.8 KB Created: 2020-08-12 06:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ca07bf316496fbd93d58e1ddd3dae84 SHA-1: de0669420d495743811fbc0282f0efd248d13fc6 SHA-256: 23d53b5d081f84b58ca42f9347abb2976d82307ec34c6ff5deb2c48efa913e75
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site disguised as a search result for a book. The presence of numerous links and the redirector strongly indicate a phishing or malicious content delivery attempt.

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/wb?keyword=microbiology%20book%20cp%20baveja%20pdf
    • http://files.renaissancevitality.com/uploads/1/3/1/3/131380292/2085208.pdf
    • http://mimexeda.wimfoxvalley.org/uploads/1/3/2/7/132740580/31e04253a.pdf
    • http://files.iloveacorns.com/uploads/1/3/0/8/130874612/faxifijamuderi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/luporanawagesifujap.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/97040730861.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/senazopasunakon.pdf
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/lottery_program_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/92240175369.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/ultimate_spider_man_comic.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/lcm_of_8_and_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/41531406471.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/sojujofibezazebikejuzod.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/lezevimuxofijupirixik.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_off00004219.bin
7891cc60c8bd9039fba471eae6db71597ab7000e80bf3a35de60bc7e122de6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4219 5592 bytes
font_01_sfnt_off00005546.bin
e2e18caae638dc107e94450404064ad7fedc10533dbc7d2520524d986886e921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5546 9940 bytes
font_02_sfnt_off0000776e.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 16164 bytes

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