Malicious PDF — malware analysis report

Static analysis result for SHA-256 1785b4dba5ad179f…

MALICIOUS

PDF

75.0 KB Created: 2020-08-28 22:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dc899ce24515423e19527301bb4de6b SHA-1: c136c834aff181af4eca894d10342c5fd0c7e825 SHA-256: 1785b4dba5ad179f18ce6228d73a740fd865a6ea96a92a9044cfac94a36c858a
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=osrs+teleport+to+kourend', which is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains this URL, suggesting a lure for users interested in online games.

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.cc/wix?keyword=osrs+teleport+to+kourend
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_f71dee7c754c49a1b475d2b705e2bff9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fafe1556de04878b0877aa3f90d2071.pdf
    • https://static.usrfiles.com/ugd/b8c837_08b91a96f3c442e09092f9c64505cbca.pdf
    • https://static.usrfiles.com/ugd/b8c837_6664b1be210a4483b4d4a3ef414dfdfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d771a117df0c467e8870d4fd291b8aa6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1068a86272d44ee79c5c33a8e5e7a9ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a1106e07fa74690aa14897735df7630.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc032211353441aaf2642c7d3f9f21f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffdba306e8c349b2bb3b062d0249fb7e.pdf
    • https://cdn.shopify.com/s/files/1/0467/8090/7673/files/chicken_invaders_6_free_download_ful.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/45969264389.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/free_customizable_drink_ticket_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4369/2445/files/yahoo_finance_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/64922262649.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/tevurejewanemag.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9309/files/serie_la_tierra_prometida_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/lowirijotuku.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3f.bin
669202999fe6935e17e0623c985f4eda5f623b507748504827b8601891be4747		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 4668 bytes
font_01_sfnt_off0000ec2b.bin
ae7087c2a5f2b5542d390fee2567f02de69598b78ef32e1e1b7f64a07182f87b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 10656 bytes
font_02_sfnt_off00011087.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 4324 bytes

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