Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0255fb14027f3c…

MALICIOUS

PDF

43.6 KB Created: 2020-08-27 17:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5addc6c9750550d949725c012c42664f SHA-1: 187a1ff3b9a1e65bb31bc0d187dfcf2497edea47 SHA-256: db0255fb14027f3c68b6d3ea2e53255da04ba1fad582ab579c18e809bca71549
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=la+mitad+del+mundo+completa. While the document body is heavily obfuscated, the overall structure and the high volume of external links strongly suggest a malicious intent, likely for phishing or malware distribution.

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/pify?keyword=la+mitad+del+mundo+completa
    • http://files.2520schooldays.com/uploads/1/3/1/8/131855992/kuwunenubazemopimo.pdf
    • http://files.ricklewisrealestate.com/uploads/1/3/0/8/130814874/bizek-pikebemomatime-jefugisitinawen-gezofi.pdf
    • http://saxotab.oceanetterrastudio.com/uploads/1/3/2/6/132681382/2597165.pdf
    • http://files.rise2awakenhealth.com/uploads/1/3/1/6/131606321/18187ba3edcf.pdf
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/drivers_toolkit_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/38551083948.pdf
    • https://cdn.shopify.com/s/files/1/0434/6603/1257/files/93287311648.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/pdf_xchange_viewer_hide_toolbar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/mega_link_generator.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/38839237743.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/re4_bottle_caps_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/53053774865.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/22272571227.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/linear_inequalities_worksheet_kuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9915/files/30099359051.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/mokizerefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/aha_guidelines_for_sbe_prophylaxis.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/probability_worksheet_gcse.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_off00006948.bin
7b0e0cb6553f1a18f0b34ace04cd0fba438533fd303432ea772f2193973dcc39
pdf-font-stream PDF embedded font (sfnt) at offset 0x6948 4888 bytes
font_01_sfnt_off000079d2.bin
fe1a9701d4eb8a3bedccac0d2209b22cd37eb26b9d5597ab1b8117e667000b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 11676 bytes