Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1861f7c66a027d8…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 21:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aca0d7639a7a996e549d0272605fd60 SHA-1: 8e45b9de9e1a4947cab605ca5163088f2590f9ba SHA-256: e1861f7c66a027d82a03bc996cdcd567ffae0720b2ecad0cdacac7c41c9a4a9d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to funnel users to further malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise the malicious intent with seemingly benign keywords like 'kindergarten worksheets'. No scripts were extracted from this sample.

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.com/wb?keyword=kindergarten%20worksheets%20reading%20comprehension
    • http://files.paprikatravels.com/uploads/1/3/0/8/130814003/44c2c67be6d53c7.pdf
    • http://pakiz.ezcommspdx.com/uploads/1/3/2/8/132814930/lugilive.pdf
    • http://givus.aztralabs.space/uploads/1/3/1/6/131607407/29d98ef3a.pdf
    • http://nukos.hartfordfederated.org/uploads/1/3/0/8/130814328/8873702.pdf
    • http://files.prettyfckingawesome.com/uploads/1/3/1/8/131856945/6646419.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/wenozusujepavivoripuruj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/jopowagebiforelazuvalud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4695/files/beauty_tips_in_malayalam_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/free_abc_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/longman_idioms_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/deductive_reasoning_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/61179257170.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/nolelumegozurofetuxepere.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/94138568233.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_off00006197.bin
5f46634ad87ce1deb79a68756ab84b6a1b3eb99e2ffe93f057b0d9534c57ac6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6197 5580 bytes
font_01_sfnt_off0000746f.bin
aaab1c9b977d32432371254e846b10069a7d035a98741f8bda120716c7b6229d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746F 10128 bytes

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