Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62b4af7c66b0f17…

MALICIOUS

PDF

35.1 KB Created: 2020-08-29 22:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c20a5178fe25fa70ac671cef8df60bc0 SHA-1: ec78ccad67be05922370162ffba2967b003de897 SHA-256: a62b4af7c66b0f17b61e31a12d2c1acad84c267ee47b74b665b4dcd941eff0a5
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One prominent URL, https://ttraff.ru/wix?keyword=plantas+de+los+dioses+libro, is flagged as a malicious redirector. The ML classifier also strongly indicates maliciousness. The presence of a large number of links suggests an attempt to distribute malicious content or engage in SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=plantas+de+los+dioses+libro
    • https://static.usrfiles.com/ugd/b8c837_ed71f763ab1042cc98a3aa668a8935ae.pdf
    • https://static.usrfiles.com/ugd/83e24f_80d32425e3fd45d58ebbd3926b7f1691.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ec3a8206cf54e858aaf867711047b19.pdf
    • https://static.usrfiles.com/ugd/b8c837_861183074ec84b019bfb727e8f6b6c40.pdf
    • https://static.usrfiles.com/ugd/760101_962457697f5041a8b00094a130ff207f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe7949643807437c89404e23c6aef9fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4456692c60a4055b451d3fd7c638e29.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6e58425420a424886fa6e7d8e2336de.pdf
    • https://static.usrfiles.com/ugd/b8c837_c79df8530f58410ab29620deeff8cf9f.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_off00004cfc.bin
ed507102ff1fab861274c705e895c496206634d00bdd36bd349cd8fa5d6d1bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CFC 4960 bytes
font_01_sfnt_off00005dda.bin
efcad0b53e9a3f3ffe0425e8a3a007cb71b0e01575ac3919698658abe51a2303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDA 10656 bytes

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