Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f18b73ec1f213c…

MALICIOUS

PDF

55.1 KB Created: 2020-08-16 01:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a4cd77b1bf4586bc526e9d082948f3f SHA-1: 2c27b98c9169ad6f55317fdf8dfea05678eff93d SHA-256: d3f18b73ec1f213c28d8d3a02abbf1b68e3e2ec38d4afcc3757b5ed4bcf10759
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 of which point to suspicious or unknown domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious content. The primary attack pattern involves social engineering through a deceptive link farm.

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=self%20propagating%20high%20temperature%20synthesis%20pdf
    • http://guligizo.nicolettedaskalakis.com/uploads/1/3/1/3/131380213/jidawevinurix.pdf
    • http://pujibolu.sustainerproject.org/uploads/1/3/0/7/130776757/2745096.pdf
    • http://files.brijuni.studio/uploads/1/3/0/7/130738548/a51539.pdf
    • http://files.bklnmanners.com/uploads/1/3/1/3/131381241/e089d1ad20bda1.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/50654594594.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/statistical_analysis_of_network_data_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/cape_town_convention_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/37049064078.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/napinekojabi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/50523424501.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/47873365181.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/affinits_lectives_goethe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/central_va_apa_league.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/xesowitubapokoxiwixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/vonaputexofebemugu.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_off00008b95.bin
3b954a1f7a778a97f5d877bf93f4d959a42a8fe9dd43a8c2868d1d7e7604a7ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B95 5544 bytes
font_01_sfnt_off00009e3e.bin
aa31267b67ab9f4e0de64910a7d5fedcabff7ff6d48b82dd3edc798654cd2d41
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 10352 bytes
font_02_sfnt_off0000c169.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC169 4324 bytes