Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f4bae5a1c39326…

MALICIOUS

PDF

52.6 KB Created: 2020-08-29 16:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dafea6d8c2aa876ee6bcdf8b32788e4 SHA-1: 6bac4e3ecbcfb6534ebc09938adb52f0e5331407 SHA-256: 88f4bae5a1c3932602bbf66332104b6920f145ce89dfd622f8fb6d459ee2e0ea
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link farm. One of these links, 'https://ttraff.cc/wix?keyword=genel+konik+denklemi', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of multiple shopify.com links suggests an attempt to blend in with legitimate content.

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.cc/wix?keyword=genel+konik+denklemi
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/multiples_worksheets_for_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/fanen.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/vovon.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/reported_speech_mixed_types_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/12100016495.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/kickboxing_rules.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6697/files/project_estimation_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/white_wallpaper_background.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/98613082855.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e7.bin
ebc0c66205eecaa15b97408e97b4ca266c1ef79c221d6a066ab8c4dd73ae161d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E7 2884 bytes
font_01_sfnt_off00007326.bin
727238e380ac5c14bd7b7b90ae432891c5a09791da587a9c7c7580ba7a393d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 4288 bytes
font_02_sfnt_off0000818f.bin
130a1745be746b93084a5a25cbe74b1a46b3a702ce17a19933a7d89f256b41c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 17752 bytes
font_03_sfnt_off0000b626.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB626 4324 bytes

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