Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1b43d3c4d55bf0…

MALICIOUS

PDF

34.9 KB Created: 2020-08-15 00:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fcf674db751edfc73e7760cabfc8d14 SHA-1: 400d266116243266a3273a41398a6f4e127bfd9d SHA-256: 3f1b43d3c4d55bf04242398c595ef19348cdc3cac54fba9e4a93e95bd51d277d
120 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with multiple links pointing to Shopify-hosted PDFs. One of these links, https://ttraff.ru/pify?keyword=eating+disorder+guidelines+queensland, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=eating+disorder+guidelines+queensland
    • http://files.sarakross.org/uploads/1/3/0/8/130874101/973424c.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/zuvesibobusojedivekariroz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/fimuxolugawil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/57958841712.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/catalogo_perfiles_de_aluminio_bosch.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/pudenidalopadove.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/ge_stoves_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/foxetarus.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/11627144120.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/xumexudepibemujawebesiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/sharepoint_2013_discussion_board_unanswered_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/central_time_zone_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/most_important_characteristics_of_an_entrepreneur.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_off00004bc9.bin
0f51fdb865b430d65143c2bb397d6e4b4d799dfe30f830c3fe7e2db319b321e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC9 5076 bytes
font_01_sfnt_off00005d0e.bin
cea9501f94f5effdb825a2030b4fae4214623873079b1c0e37221bd916749f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 9940 bytes

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