Malicious PDF — malware analysis report

Static analysis result for SHA-256 28030d0500a8ad62…

MALICIOUS

PDF

77.0 KB Created: 2020-08-29 04:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b6d9af72a9ee6f848a332704150780a SHA-1: c79853a6056bcb9042993ae8c15d58c4a72c4fc3 SHA-256: 28030d0500a8ad62b6525ea1e0b7acc9a055605a167f362a982a5a17bad1c54a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with academic keywords. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to redirect the user to a malicious site.

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=roles+of+oxidants+and+redox+signaling+in+the+pathogenesis+of+acute+respiratory+distress+syndrome
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/mazagamedodego.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/3242249449.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/setawamutuwovana.pdf
    • https://static.usrfiles.com/ugd/b8c837_0775ccb3b10543b584732e3dc8571d0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a1d658857f4d34893b47ea1a85923e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac56e41ec68e4ae8973c6b0885f2cf58.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2fa4c5a9034155bfc4a019c88e5a6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b591ec52d39a4c9f9a80b3a5797639c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_02b4302d4f1043058007fd589118c5d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d75d49960f9c47feb215f5ad939edd75.pdf
    • https://static.usrfiles.com/ugd/b8c837_70a1ffe7f8bc4e2f9c2a1297548aa03e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7b8fe502414435caf3b819606886c9e.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_off0000eee4.bin
db868a759ed3dfddbc0cb386cb1bd15e4b96d437e5afcd46612642dbe9613cb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 5744 bytes
font_01_sfnt_off0001025f.bin
e20dc9fef0873a1c65a45885d664121ae8b05a24eda4e9cd991313a6b19a7514
pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 10332 bytes