Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc02eeae19715d2…

MALICIOUS

PDF

37.9 KB Created: 2020-08-24 19:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d238aa2313e08ceaf66ee84da077b0d SHA-1: 5f6f96cafe62de40ad3dbc9fe11f04f26a95a158 SHA-256: ecc02eeae19715d2b638199e72bd64b2e1e8917701929dd50df37d55adbce390
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=common+core+math+worksheets+5th+grade+decimals', likely leads to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to various resources, some of which are hosted on potentially suspicious domains. The primary malicious link is the most critical IOC.

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/pify?keyword=common+core+math+worksheets+5th+grade+decimals
    • http://pusixige.humanityreboxed.org/uploads/1/3/2/6/132695366/fubagonodemepigivopu.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/google_account_manager_apk_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/48743865592.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5899/files/71818702808.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/dieta_para_acido_urico_alto_gota.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/gajisavukurevelolodet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/context_clues_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/69878216706.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/wekemadugigav.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/cambiar_de_a_word_free.pdf
    • https://cdn.shopify.com/s/files/1/0446/2919/6963/files/ice_cream.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_off0000554b.bin
9ec56f3a9ce1444e0c26e2fcad2521112fa39a82b0be650326cd83e82602c479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554B 5536 bytes
font_01_sfnt_off000067fc.bin
2535fb698fe80449d0135190d8d129d5f5c95326ec431959ba814728c83ca175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FC 10176 bytes

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