Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3b610bf74b18ad…

MALICIOUS

PDF

43.7 KB Created: 2020-08-25 10:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f255b17f40606297f3ed9872142f884 SHA-1: f6d34707a9c55249be66c6e9866ba8f977a4dc8f SHA-256: 8e3b610bf74b18adf9eefd11c0c020d32679de78a2047071eaad1fd9e00213ed
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=barlowgirl+carol+of+the+bells+sheet+music`. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, with the primary one being `https://cdn.shopify.com/s/files/1/0433/7601/7559/files/php_abstract_class.pdf`. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL, suggesting a lure to a malicious site disguised as a search result.

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=barlowgirl+carol+of+the+bells+sheet+music
    • http://files.kwjclassiccargifts.com/uploads/1/3/1/0/131070469/4647899.pdf
    • http://lopaba.athleteslab.org/uploads/1/3/1/0/131069934/2956255.pdf
    • https://cdn.shopify.com/s/files/1/0433/7601/7559/files/php_abstract_class.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9112/files/duliwu.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/headway_elementary_video_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/wobezona.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/73220606230.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/55835606033.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/livro_qualquer_coisa_serve.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/dekopul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/24373989640.pdf
    • https://cdn.shopify.com/s/files/1/0453/8669/4824/files/snow_report_alberta_canada.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/neonatal_guideline_hypoxic-_ischemic_encephalopathy_hie.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/european_guidelines_hernia_repair.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/biuret_test_for_protein_lab_report.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_off00006ba1.bin
9432cf20f17d61116c872cec61c2827b9d72e4deea45a770ff39f324fa5d50c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA1 5576 bytes
font_01_sfnt_off00007e8a.bin
89da5b8547dee1b85372392980593082afa2b9ca531a29e1c81cd9bf49ab033e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8A 10240 bytes

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