Malicious PDF — malware analysis report

Static analysis result for SHA-256 535ba43af0aef240…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 14:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c1f10faae8af6405889d0d1c70e2e93 SHA-1: 1134894b6406a8d8e05ff9df04e21cac1a44577f SHA-256: 535ba43af0aef240ef88cc2ef29da71dae18dc574b54d109728ca5e1f54588a2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm and a redirector to malicious infrastructure, disguised with a lure related to election card correction. The embedded URL https://ttraff.cc/pify?keyword=online+election+card+correction+form+gujarat is a critical finding, indicating a redirection to a malicious site. The document body and heuristics confirm the intent to trick the user into clicking a link, likely leading to a further stage of infection.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=online+election+card+correction+form+gujarat
    • http://files.dianakersey.com/uploads/1/3/2/6/132681342/3948673.pdf
    • http://files.parseekerstbgcc.com/uploads/1/3/0/7/130739288/9901788.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/bowabebitobaguwokevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/kuxofiriwiruv.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/vegugaxiresemide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/oxford_chemistry_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/wugagus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/10181207426.pdf
    • https://cdn.shopify.com/s/files/1/0455/7661/8149/files/pdf_file_convert_to_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/32041892171.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/pagegetip.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_off00005f44.bin
2822ac41f4c72d8eb72f4cabec3214ee3c854eba5032f412819fb86d690ddaf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5264 bytes
font_01_sfnt_off00007116.bin
42382454957d813a7b1f7002b3d445ba040de9c9352a9697d2191ceb6b554f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 10076 bytes

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