Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8385bf1e3f7c7c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 02:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25b63ce2997d20bc00d1fd42bb06e00 SHA-1: 9ddece7a991d31fe8fa01da34ff536152274459b SHA-256: aa8385bf1e3f7c7ca0e1ae636442bf8c907729ebc0f48dd0e9cf7c742a134ab7
130 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, masquerading as educational materials. One of these links, 'https://ttraff.ru/pify?keyword=creation+story+worksheets+for+youths', is identified as a malicious redirector. The presence of a 'download button' lure further suggests an attempt to entice users into clicking malicious links. The document body, though heavily obfuscated, contains the same malicious URL.

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.ru/pify?keyword=creation+story+worksheets+for+youths
    • http://files.atonewellness.com/uploads/1/3/1/3/131383398/gananikukikadu.pdf
    • http://zopipogaz.biocompatibilityhub.com/uploads/1/3/1/4/131453540/wevisabizagono.pdf
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/oxford_discover_grammar_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/sports_and_hobbies_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/12889239323.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/radomojokatubugaraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/11283631529.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/video_editor_pc_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/ca_cpt_2020_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/93056863945.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/3dmark_11_demo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/taxivepokilaril.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_off0000694a.bin
104df1c8edfefa3affd8206b574b4171c9db95e2051aea90c9123a7b4e0fe223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 4984 bytes
font_01_sfnt_off00007a4f.bin
a3e97779d48df2d620a62bb0088233ed00affedea3294977eeece88dd3d64c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 10068 bytes

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