Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88dcffdfd50ff13…

MALICIOUS

PDF

32.0 KB Created: 2020-10-14 18:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb5b06cb343bcb89999348252775284e SHA-1: 6114c50e10f531d59f9abeeb7769d4500747633f SHA-256: c88dcffdfd50ff13e8093bd5c9f587a99cfe33fc6b9cc3f8e94abedea128b7d0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://gettraff.ru/strik?keyword=nagara+style+temple+architecture+pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0143/6569/files/drag_racer_hacked_weebly.pdf
    • https://cdn.shopify.com/s/files/1/0484/4109/8398/files/sanyo_pro_xtrax_multiverse_projector_plc_xu41_manual.pdf
    • https://cdn.shopify.com/s/files/1/0494/2518/6971/files/evans_high_school_basketball.pdf
    • https://cdn.shopify.com/s/files/1/0434/8064/5782/files/object_oriented_programming_multiple_choice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0480/3343/1711/files/www_andkon_defense.pdf
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/partners_real_estate.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/24505810341.pdf
    • https://uploads.strikinglycdn.com/files/f12022eb-5ece-46ea-a027-5e64fe6df0d7/41032322407.pdf
    • https://uploads.strikinglycdn.com/files/2bfd1ca5-25a1-4a20-a06f-ae56cd47be50/zoruwixapuzeperinuj.pdf
    • https://uploads.strikinglycdn.com/files/0a009b27-f304-4072-9b2f-4e9aa0490a91/nujonefazusisegimituzak.pdf
    • https://uploads.strikinglycdn.com/files/cdbe3e2f-04b4-4ceb-be0a-a62a4a072470/xomipugivixobafegof.pdf
    • https://uploads.strikinglycdn.com/files/bf871fd5-10e4-49c7-b4f1-a5262002e576/didamanosibamof.pdf
    • https://uploads.strikinglycdn.com/files/bd61a65a-92f0-4c7e-a847-3b5f9844e1a0/54706442385.pdf
    • https://uploads.strikinglycdn.com/files/2caf5a22-4efc-4fe9-9246-4fe54a13b4c0/16758954366.pdf
    • https://uploads.strikinglycdn.com/files/a9787a81-dd73-4b98-83a7-2117e1611b1a/borom.pdf
    • https://uploads.strikinglycdn.com/files/a10eb596-811c-40b5-b3b4-07639250816a/15525985355.pdf
    • https://uploads.strikinglycdn.com/files/2a073ba0-2e78-4cef-b96a-a5ae3b999fa2/3419252380.pdf
    • https://uploads.strikinglycdn.com/files/aa4e6083-d92b-40d3-9473-0af028303cb4/vaxolazofufipigufude.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ee.bin
daf875e777190f7c5ac098f610c02d0bb072af6ab8bbf9fe251f327e5b70a98e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 5640 bytes