Malicious PDF — malware analysis report

Static analysis result for SHA-256 49168c1bc22671ed…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 15:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 531a8f90e24065e76f03fcad7dfda15e SHA-1: 690ceea4226e912d0d1334ccef27308d4bd3a950 SHA-256: 49168c1bc22671edf4c23938f023c04a6842c35b9f5843e12686ffaec1526db8
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, characteristic of a link farm designed to improve search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=epidemiologia+basica+pdf', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains a mix of text and what appears to be encoded data, further suggesting a malicious intent to obscure its true purpose.

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.com/pify?keyword=epidemiologia+basica+pdf
    • http://files.coachellavalleyhypnosis.com/uploads/1/3/1/3/131398555/9324606.pdf
    • http://files.caregiverinspirations.com/uploads/1/3/1/3/131381706/sukemuseb_fozax_sapizosupub_bosiw.pdf
    • http://jidunofi.agroschurch.com/uploads/1/3/2/6/132681556/zezokezuwaz.pdf
    • http://files.adriannadougherty.com/uploads/1/3/0/7/130775084/nonemoruvumok_nezuvijedine_papeliz.pdf
    • http://files.quiethouseediting.com/uploads/1/3/0/9/130969772/171dc29df6.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/wezin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/libilure.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/93342324353.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/wiz_khalifa_remember_you_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/90293835922.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/89106166429.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/8483411078.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/30196606194.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/xokowevasimaforodema.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_off00006172.bin
2ae7ebca3d83bbf48e57719425b113f2891cfe016968e855e1e41c5a0f67107f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5080 bytes
font_01_sfnt_off000072c1.bin
2ffd3528aabb242465a5314238eeca4be4ab13cb57dcbcc07a866bee904daed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 10892 bytes
font_02_sfnt_off000097d7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x97D7 4324 bytes