Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b10fd4c0543a6b5…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 17:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b20062f634d64e84a68f7539667aad1 SHA-1: 8a6ec3889d994e818c1461043e1b82a8e86de501 SHA-256: 3b10fd4c0543a6b547114c8515a7a2ae8f3d6f838af755d70a13983a4cbde09d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=carcinoma+no+microcitico+de+pulmon+pdf', which is flagged as a malicious redirector. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests an attempt to obscure the true malicious destination or to leverage SEO techniques for distribution. The file was generated using wkhtmltopdf, a tool often used to create PDF documents from web content, which can be abused for malicious purposes.

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=carcinoma+no+microcitico+de+pulmon+pdf
    • http://files.crexcats.com/uploads/1/3/0/9/130969211/6976071.pdf
    • http://files.pyramidodi.com/uploads/1/3/1/6/131636746/8673200.pdf
    • http://files.shaeshaeshae.com/uploads/1/3/1/4/131406827/zezejujumo-miwoxoporomep-bezedun-nolag.pdf
    • http://files.sparkfoundation.ca/uploads/1/3/1/4/131453823/8738578.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/lowes_anniston_al.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/delancey_and_essex_municipal_parking_garage.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/appelle_moi_par_ton_nom_franais.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/57314408258.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/79493372087.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/bcd_code.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/busugalirifizowipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/antiacidos_y_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/bisection_method.pdf
    • https://cdn.shopify.com/s/files/1/0437/3155/0362/files/alexander_dugin_fourth_political_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/24023114377.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/12400744291.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_off00005da6.bin
71b6ff9737d5a5cd5624f961a1fd14497da66f9a3d43cc2ce7b283ffd70f4200
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5028 bytes
font_01_sfnt_off00006ea6.bin
4d587ec12a280481eeb144229e44ef7dcec72ed76a61569d8571b25a1f2c4756
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 10380 bytes
font_02_sfnt_off00009226.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 4324 bytes