Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb642e761b952149…

MALICIOUS

PDF

36.9 KB Created: 2020-08-20 05:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1561b18bf49b9198da28d7300817bc20 SHA-1: c2c325ccefea87155d2cd9e62a894a2ef6bc846f SHA-256: cb642e761b952149eee7b16b16818f4c7a066ae410fe245d326bd34efb2288f2
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in conjunction with a lure for 'netflix android box apk'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, many hosted on Shopify, intended to manipulate search engine results. One of these links, 'https://cdn.shopify.com/s/files/1/0433/6710/4664/files/esl_154_practice_test.pdf', is part of this farm. The presence of a download button lure further supports a malicious intent. No scripts were extracted from this sample.

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=netflix+android+box+apk
    • http://jebelu.katherinebolynn.com/uploads/1/3/0/8/130814011/2781130.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/esl_154_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/buzutovoximegenufikoza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30106301206.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/siforumusezoweka.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/battle_of_the_mind_joyce_meyer.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/94250396536.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/43714027465.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/seether_truth_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/jekibexolusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9648/files/python_sort_dictionary_by_key.pdf
    • https://cdn.shopify.com/s/files/1/0439/1976/9755/files/hydrology_and_floodplain_analysis_5th_edition.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_off000054aa.bin
5ea53ca0dcf70b90cd38449c609a4c8eca42bc778ab1b47fd19801e323b10170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 5096 bytes
font_01_sfnt_off00006612.bin
fd46d540ff8e66db206f57dd4b2e40b31dba118aaa7f0915e5664517f64cec65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 9716 bytes

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