Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5379a9d5fb2a1c…

MALICIOUS

PDF

35.6 KB Created: 2020-08-30 10:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bfb9f5c8fe88bc069f385f1d22249d8 SHA-1: 994f96b2c8c55cab7dea1bd93fe08718061b8967 SHA-256: df5379a9d5fb2a1c28e9577f2219cfdb78f5d70fdd90aad9142f9813b39bf520
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to host a large number of external links, many of which point to benign content but are likely used to obscure the malicious redirector. The primary malicious URL identified is https://ttraff.cc/wix?keyword=maslow+project+grants+pass. The document body contains garbled text and embedded URLs, suggesting it is not intended for human readability but rather as a vehicle for link 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.cc/wix?keyword=maslow+project+grants+pass
    • https://static.usrfiles.com/ugd/b8c837_34572aa648de458f823d9caeefdf3df6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d37cacaac1b4d3b83e38fa871d2ed5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff10f24e6597413396d47af256bffd89.pdf
    • https://static.usrfiles.com/ugd/3e9e83_6ea49795ead442589045a76d4edc3e91.pdf
    • https://static.usrfiles.com/ugd/b8c837_16a197206b3d42e798e881b61fe74dd9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://cdn.shopify.com/s/files/1/0437/2286/6842/files/cannabinoides_endogenos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/wuwumenotesajom.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/24912418405.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/lipegijirajawadifiraro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/tavibofuresagifebuje.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/github_create_new_repository_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/gijugaduwefegup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/attenuators_in_microwave.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/wimapilemifugafudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4313/files/49505205637.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/56774386235.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/blended_learning_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/99844093648.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_off00004c8b.bin
feb711f615e60ca299dcadd1b88113f90731ee0c7ae6d5540646294453c0fc9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8B 5272 bytes
font_01_sfnt_off00005ead.bin
cc0e28e55dce5659e6c9e9d2759f977aec0607d852cd5b8420da5690a4462892
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 10096 bytes