Malicious PDF — malware analysis report

Static analysis result for SHA-256 4156ffe40984bd2c…

MALICIOUS

PDF

34.4 KB Created: 2020-08-27 18:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 830ca43fdb1f83947befcd95e97cb6a6 SHA-1: 43e2d17cc1a3e565aa48d1c4d289653b59a688f4 SHA-256: 4156ffe40984bd2c3dc865638454c5af0f678ead2f2baa56da87f0119c914594
120 Risk Score

Malware Insights

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

The PDF contains a deceptive link that redirects to a URL associated with malicious redirector infrastructure. This link is presented in a way that mimics a search result for a book, aiming to trick users into clicking it. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm tactics used to distribute malicious content.

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.ru/pify?keyword=nathaniel+branden+six+pillars+of+self+esteem+pdf+download
    • http://busakake.elgatothecat.com/uploads/1/3/2/6/132682883/nupofa_xofanuvade_wibefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/dosugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/28678811947.pdf
    • https://cdn.shopify.com/s/files/1/0443/0246/7228/files/jb_lightfoot_apostolic_fathers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/79752163143.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/tinkers_construct_electrum.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/job_handover_list_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/sapejetafexijoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/introduction_of_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/18009209739.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/vokerunonigoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/xukolikakevutapulalejodoz.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_off00004923.bin
f0e0626eafec48f9acfb047620426cfd2e85294eec24c0aab70e0174d23db8f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4923 5552 bytes
font_01_sfnt_off00005bdf.bin
3b729c27d43780a136c5b8a5f29fcc2e31f02fd61938625c6e23ff0634c21581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDF 9580 bytes

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