Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d059944f9cd5dee…

MALICIOUS

PDF

47.5 KB Created: 2020-09-02 08:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00495e40f056f0f2822c478e3e181a00 SHA-1: d976ec90eef41e77e9d19fe6aff04ceac99fbdfd SHA-256: 5d059944f9cd5dee37ec19e48e92f14d0085d1f63f8171e20f82568c3e5cd2e2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=japanese+customs+declaration+form', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to customs forms and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links further indicates a link farm intended to obscure the malicious destination.

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.ru/wix?keyword=japanese+customs+declaration+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_35a747650f124f05aed3b72a6086b999.pdf
    • https://static.usrfiles.com/ugd/73c254_d444f5ae860f42769d36902164d7611d.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/vipevadibevijiwuzif.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/julanisuseva.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/malayalam_bible_funny_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/lokul.pdf
    • https://static.usrfiles.com/ugd/286fb8_c4252d9d7396406a9c48e3eaee4e2945.pdf
    • https://static.usrfiles.com/ugd/16a96a_dcbf40ce6dba4221860624a6bfee0061.pdf
    • https://static.usrfiles.com/ugd/4c76bf_e42284ca4ffe4982aeb170ef51004351.pdf
    • https://static.usrfiles.com/ugd/81d6a4_4e87dabd34b344b2905f8f574fb8a177.pdf
    • https://static.usrfiles.com/ugd/b98abb_57a0fcbd31794b83b104541a3f54479a.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006549.bin
60758f61f8676af7d47ec79d0336be3bc6f722877d4e119f5d541a5b665ec848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5288 bytes
font_01_sfnt_off00007730.bin
900e170eb4c3f592d7e1737148c2277ef1fd5046f283d52d244b1cd95b25ae1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7730 10748 bytes
font_02_sfnt_off00009be8.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE8 16144 bytes

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