Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f9f64f20fb72bb…

MALICIOUS

PDF

48.6 KB Created: 2020-07-23 03:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e99bbe1faac9946ec950540625f73af SHA-1: dbbce49964c65189c1399077be2b81af6d5a2381 SHA-256: c0f9f64f20fb72bbc3cc2dcbd5f921fad032d6420870ee78d26dda1e45e14773
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other potentially harmful sites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for SEO spam or malicious redirection.

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=sintesis%20de%20histamina%20pdf
    • http://files.athenselks973.org/uploads/1/3/1/6/131637131/620391.pdf
    • http://files.nm2050.org/uploads/1/3/1/4/131406270/1fd64c0a941a7a.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/13160
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/tusibinevananixodinat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/51237846733.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/faxozil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/gorulowofukitizidopi.pdf
    • https://faxonitu.files.wordpress.com/2020/06/sogigikazulopulowutu.pdf
    • https://runowabak.files.wordpress.com/2020/07/tanepodoxudigawakesa.pdf
    • https://jasubujowexu.files.wordpress.com/2020/07/gekalet.pdf
    • https://xisomivupeba.files.wordpress.com/2020/07/wafudinosewonez.pdf
    • https://pasozabesis.files.wordpress.com/2020/07/92973109446.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/biwuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/49392482568.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/lijapeziluvonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/vobolidedaterij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/pakavazimudedetoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/zibokiwitibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/33254355991.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_off00007eee.bin
ace52dced96314a52da17ea9b4d8673530f08f315706ec32fe68ffceaa672512
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEE 4936 bytes
font_01_sfnt_off00008f81.bin
75209b4d4649fd900bf6c53cd4b3ae23a5bc3c763b854f74ca6288261f497c1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F81 10928 bytes