Malicious PDF — malware analysis report

Static analysis result for SHA-256 8031f0172630df96…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 18:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd91adf9fe5d9621564111eb5b4eae53 SHA-1: abdaf76f7f8d581f015b0d4c161fded67afda56f SHA-256: 8031f0172630df961ab96de39ffb11f41e3fbe7df190f251edb781b239d50ba8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection scheme to distribute further malicious content.

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.com/wix?keyword=desarmar+lavadora+mabe+lma96db
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_72115776a4274be4a9a49a3aebd463b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8992c6c61f6a4a778ae1079b6b64cb02.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c91929b26ac4a369e61d35d2d485e70.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca9b70c27e743ee82280ac60cf0ac31.pdf
    • https://static.usrfiles.com/ugd/b8c837_44b0347737ab4394b3e02defa38c2303.pdf
    • https://static.usrfiles.com/ugd/ba3095_6c0b25f55b8247bca4dc0e50102d4102.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/nokapebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3047/files/ortaokul_matematik_olimpiyatlarB.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/katokosolowozovi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/anesthesia_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/basic_and_bedside_electrocardiography_ting_vit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7593/files/muzewero.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/personal_financial_statement_template_excel.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_off00005ccc.bin
0d03b71ee3b950508c8dccea1afc905ffdfa5d2cb8ef387dfcb91ebe3e7ad89f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCC 5480 bytes
font_01_sfnt_off00006f54.bin
66ba940b75f05d9f105e6fcc2da87d02121bf59341c935154f712b87618b6c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 10144 bytes
font_02_sfnt_off0000923b.bin
7492f0c3725aa994426e37e09b4f2480a54d4a3c892717f35e8ef9bfc4b68517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923B 16440 bytes

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