Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2a4ae99d408242…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 02:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 695a9580284b56e280052163ce7ffece SHA-1: a7ac55fce4c65023da1a9c71bf14923047c282d7 SHA-256: fa2a4ae99d408242be773c857cf46a27c4e8fd12bd2c4cfccd4783e0953bfb03
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to '2 hydrogen ions and acidity answers' and a URL that appears to be a lure. The primary heuristic firing indicates the PDF links to known malicious redirector infrastructure, suggesting an attempt to lead the user to a malicious site.

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/wix?keyword=20.+2+hydrogen+ions+and+acidity+answers
    • https://static.usrfiles.com/ugd/b8c837_5f600633f2ff4fc5b198964fd0905691.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_38bd1e0effc24685909a3eb8bd8e44f5.pdf
    • https://static.usrfiles.com/ugd/7198c1_76d3b960cf7b4562b5493aaf5f6135ce.pdf
    • https://static.usrfiles.com/ugd/f6a907_77471f8aae0441a4a35e62758ad555d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da63428f93e4d8aa7d384ada091b80b.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/vewuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/89216425212.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/sodupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/xudibigazifizefovunata.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/darksiders_comic_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/beatles_michelle_tab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/zogepawojexawog.pdf
    • https://cdn.shopify.com/s/files/1/0457/5635/0628/files/guided_mindfulness_meditation_script_for_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/small_crossword_puzzles_with_answers_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/27108478992.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_off000072e0.bin
dce7e6918ab9029b138c6e1bd75d13dcf0ffd88900e3db3557c7c992c2167a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 5572 bytes
font_01_sfnt_off000085f1.bin
663b2882419c42d7bd5820782091347c24320e451ac984e8b15661ae853fcd6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F1 10648 bytes

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