Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daedba14cbceda8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 17:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 765507fa20172436073532db5e11a5c8 SHA-1: ebd2b6d8ef8538c2511de2d2ad0dc8f66a0a137e SHA-256: 8daedba14cbceda85577e18f44fdadc4bc3a961d4f48658189a3304828bcf0ca
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The primary purpose appears to be SEO poisoning, directing users to potentially malicious sites through a 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.com/wb?keyword=chess%20board%20image%20pdf
    • http://files.psignologic.net/uploads/1/3/1/4/131453226/jejixedenaregi.pdf
    • http://files.usbehavioralsupport.com/uploads/1/3/1/4/131437253/5357875.pdf
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4843/files/facilities_planning_tompkins_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/calligraphy_alphabet_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/everything_i_never_told_you_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/xirinomafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/firebase_query_by_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/7750896330.pdf
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/biography_of_mahatma_gandhi_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/13515948428.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/canzoni_scout.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/mumejovilowarubijelanazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/budding_in_bacteria.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_off00005e64.bin
4bca80070dcf4636dfa6bcb0ab3a3f5c76d3d235c659172e444f4b0c818b7c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 5468 bytes
font_01_sfnt_off000070c5.bin
0f66ce31cb7d34177cbd462667ec3639edef27f4b2c51d606d74f71102b938d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 10156 bytes

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