Malicious PDF — malware analysis report

Static analysis result for SHA-256 069da4f0ed82f80d…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 02:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bdf65df495aa7f7ca310f15850481eb SHA-1: 510159a93c3ff25740bb8c373f83fe4eb0a0507d SHA-256: 069da4f0ed82f80d9628153d288d36a6aff35383bcb04194b42f93dabb4a4947
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=sabse+bada+khiladi+mp3'. Additionally, the document body and embedded artifacts suggest a lure related to popular media, combined with a large number of external PDF links, indicating a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=sabse+bada+khiladi+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/scott_foresman_social_studies_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/23917554063.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/essential_university_physics_volume_2_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/pagowul.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/govarogokekegukur.pdf
    • https://cdn.shopify.com/s/files/1/0429/7192/2591/files/96815122091.pdf
    • https://cdn.shopify.com/s/files/1/0432/1420/9186/files/tozojumuzisovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9637/files/wubojefizorigaza.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/tony_robbins_unlimited_power.pdf
    • https://static.usrfiles.com/ugd/b8c837_f829191d3d784ce78ef087319e791926.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72bf1bb1da8404abea58e9d5f721bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fbf20b3a4684a5ba762c53a39b1ad9c.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/child_depression_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8829/files/uniform_building_and_accessibility_standards_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/novub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/79431281249.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/29397294902.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb4.bin
ed2a6ebceb49b28dc1bd4010a274ef10fe3819ec28c12abbddc00cd1c8cdc424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB4 5576 bytes
font_01_sfnt_off00005f75.bin
d4e88d09b00f483c95b547b6c4aa83339f99893aac070c322424285bd60fdd93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 13544 bytes

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