Malicious PDF — malware analysis report

Static analysis result for SHA-256 7847aac5d6d0672d…

MALICIOUS

PDF

72.1 KB Created: 2020-09-02 19:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f036c07f61b43d1b20bc39efd185244b SHA-1: 90d31b5db69d329a243192a0d1f7227fb2ccf1de SHA-256: 7847aac5d6d0672dbfd22f791c6954322a71fdbe162a148cbc2a5ece4714aa2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is a redirector designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the URL and text that likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=jeremy+bentham+panopticon+writings+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/foolproof_academy_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/tumblr_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/10300399262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6155/8944/files/3550474629.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf0f5_49e3f252e94c448b8be33c1e872b7a6c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bae363_9b9617a4683742709b277cbb4c7378d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c836c3_75f92ddf97f8425589d0cbb0fa041a90.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aee12_11a742859807499ca979a6b64459e239.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b9801a_a8764db578b04f678ec85c8dd3f90c4e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eaf48f_dee4fe556b8446099fe336cb407e5f06.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ad2ade_2fbd2d8963f24f2698b29edec4455fa0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/88a84f_3923e58a3d684b9d92bf6a627d80616a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db93e9_68afa0621086416fbd9b4ee54565d76f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/007d40_8a715ffc6a1b46a2bf5ed23590c75a6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/917232_b0729617462c4117810d6eb3dc62fc89.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f17c08_e17b8734f1c94348b91de2c1cae15c98.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdc.bin
f9dc2903f82d01714f82e7277cd78152adf7f283ce4e27a532a2f7a2e45c2d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 5860 bytes
font_01_sfnt_off0000f0b5.bin
4d1dafdd300b25760b7ba0351f3f60e0f7ac5a1804f7912c925035b0f955cdf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 10124 bytes

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