Malicious PDF — malware analysis report

Static analysis result for SHA-256 c074c304aa0952af…

MALICIOUS

PDF

36.1 KB Created: 2020-08-21 12:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c5325f4d0904f951a35e1d128c158da SHA-1: bf6e97e2afccb97dffb76e4a9d360b49c5bad05f SHA-256: c074c304aa0952af26cfa64a0dbc1f80cb7f534d0f27ba24fc4bacc23865da1a
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to IELTS speaking materials, directing users to a malicious redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary link. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The document body contains the lure text and the malicious URL.

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=get+ielts+band+9+speaking+pdf+vk
    • http://gunumofe.hsforbc.org/uploads/1/3/0/8/130874493/64043ab.pdf
    • http://xokaraf.ecec-ata.com/uploads/1/3/1/6/131637814/14a64984.pdf
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/53790524133.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/moxogebasaleb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/97742352624.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/kofemolejekowizonoroganix.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/fake_0gambling_sites.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/jemabiminosawuboxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/acheron_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/53101741501.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/49293132754.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/current_location_address.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_off00004f90.bin
3a56d7978ce05cea7a968ef594a50087a56a6141ad835226ee0724d0edcf2649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F90 5564 bytes
font_01_sfnt_off00006297.bin
c8fea23408aabf7485d3026d5a2eae7e2b634128f0f36866715495a911375b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 9796 bytes

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