Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d6ba3a97ff9d4e…

MALICIOUS

PDF

32.2 KB Created: 2020-08-30 18:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a5f6c8aabb4e8b322aa505077f57b0 SHA-1: 34f8a9ee21cf231a002657d2f3605c42842d130e SHA-256: 69d6ba3a97ff9d4ed19f3ff8e995456fea0ff7d173601661e725bca815747828
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs is https://ttraff.com/wix?keyword=patterns+of+world+history, which is identified as a malicious redirector.

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=patterns+of+world+history
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a234725131204072be73204f96052323.pdf
    • https://static.usrfiles.com/ugd/de3d83_89f589cb8588465982bc10803b2fad42.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f20a658b6594a728d1e632be534843f.pdf
    • https://static.usrfiles.com/ugd/804ff6_e2620531f4dc47c6be50e72874d1916c.pdf
    • https://static.usrfiles.com/ugd/33a16d_53380cca019d40a99cc251b4729060cc.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/redivososoli.pdf
    • https://cdn.shopify.com/s/files/1/0437/3299/2161/files/53881053704.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/dodimozer.pdf
    • https://static.usrfiles.com/ugd/2ac701_919c01d3306c4fda9d8f705853af7e2e.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_c9386180631a4048a731e2560f66b6bb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000419a.bin
c1c163b87f8987f28b8635ddc30b7a10efd352f861fd3ffacf8ddf8838aaef48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x419A 5188 bytes
font_01_sfnt_off00005344.bin
5f929d28c14385da353be833e20b4e321d6c3168d856e6e2a82c682f6f5870ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 9888 bytes

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