Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebc4c3f89035776…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 01:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf5f7d2352a7a68d3a414fd133c1baff SHA-1: ada3125f1f4c3d07dc17aabfe4ac48ed5834a877 SHA-256: aebc4c3f89035776359d2acceae9b8bd65abfccacf6c920b440c8f088759aef4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector, and presents itself as a free game download. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this document may be a precursor to delivering a password-protected archive, a common tactic to bypass security filters.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=counter+strike+game++free+full+version
    • http://files.winkkidsco.com/uploads/1/3/1/3/131384229/8751124.pdf
    • http://vajim.dacbuildingservices.co.uk/uploads/1/3/1/3/131383483/4200669.pdf
    • http://nitopeluj.shefaholistic.com/uploads/1/3/1/8/131871721/ef070a1b1.pdf
    • http://files.landmarkmanaged.com/uploads/1/3/1/6/131606984/6cf60.pdf
    • https://cdn.shopify.com/s/files/1/0460/0866/4231/files/free_ecommerce_email_marketing_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/begujupagojarujudun.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/project_appraisal_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/ropavutadurewavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/93350904883.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/42632611476.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/lol_guide_morgana_support.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/cocoa_butter_transfer_sheet_printer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/data_structures_and_algorithms_in_c_wiley.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_off0000794c.bin
26bcdcb7219bbceae149230057620f2797cdc308f9aea92d5b6caba8ac462b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 5116 bytes
font_01_sfnt_off00008aa6.bin
0cfa413fcb3ee8fbd9ec5061b5702299b3e68fce9bac7644368ffefefda7096d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 14484 bytes

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