Malicious PDF — malware analysis report

Static analysis result for SHA-256 babcdc7f54d83193…

MALICIOUS

PDF

48.7 KB Created: 2020-09-05 01:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15fbbae325afa98c25178c38d010aa85 SHA-1: 5cbf7bb615b7e6c2b60c76f8a561009f1df8c895 SHA-256: babcdc7f54d831930ccf16ddfdda0f3135e816ada05e1bbc7678894070379394
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, https://ttraff.me/wix?keyword=simple+past+form+von+happen, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its primary purpose is to direct users to malicious infrastructure.

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.me/wix?keyword=simple+past+form+von+happen
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/sun_solaris_os_iso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/appalachian_spring_full_score.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/encapsulation_and_decapsulation_in_osi_model.pdf
    • https://static.usrfiles.com/ugd/787b0a_f64dd80d5cf4434795f69737f83de3cd.pdf
    • https://static.usrfiles.com/ugd/a2d007_c026741fab7c47a8a4e82c9fd1accdc4.pdf
    • https://static.usrfiles.com/ugd/dcfb95_6646dd685a894a46a3b06d2a71522d77.pdf
    • https://static.usrfiles.com/ugd/8c0e65_a4e42235c0f04f1085b31f1d1af8a1bd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/42692072844.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/89234349238.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/fovepazategibuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/physics_of_atoms_and_molecules_bransden_free_download.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_b76f8cbb69cd4c8e87cac10bec18aec3.pdf
    • https://static.usrfiles.com/ugd/359e64_89ae6f7017c34f7e8040dd1e2a4efe4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ef12abd6e7b45b7a467773c1fd6f4e4.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_off00007a7b.bin
728c8abd77ce8bf9fd721b9a67a73888f48fcd33f54b45bee44beb9301f99319
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 5304 bytes
font_01_sfnt_off00008c5d.bin
124a7ac2ab5e45bf3e6a0aa9d0e8e23191fb3903b17d33b32a171470ec4878b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5D 12704 bytes