Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8950eb1082e4767…

MALICIOUS

PDF

33.7 KB Created: 2020-09-13 00:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6cffab93ca94d1f4e5878c91661cb6 SHA-1: 57fb44ef6b35d7835ef1a4bac80cc56ea9e5fae1 SHA-256: f8950eb1082e4767896fbac2941234bdbe99a70a41ebe913feee2f70468f9941
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'vocabulary workshop' and includes the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute the malicious payload across multiple domains. No scripts were extracted from this sample.

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.link/wix?keyword=vocabulary+workshop+level+g+unit+6+synonyms+answers
    • http://files.amazingpakistanis.com/uploads/1/3/0/7/130740049/0ba587349.pdf
    • http://files.southgeorgiaelitecheer.com/uploads/1/3/1/8/131856124/877c02ffd52.pdf
    • http://files.doncasterchoralsociety.org/uploads/1/3/1/4/131454304/8011846.pdf
    • http://files.btccricket.co.uk/uploads/1/3/0/7/130740591/6101994.pdf
    • http://resipulud.wildonwildlife.org/uploads/1/3/0/8/130814328/a6f555a714ba12.pdf
    • http://dosagijik.truehopehealthyliving.com/uploads/1/3/1/6/131606875/gagasixuzan.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdf
    • https://static.usrfiles.com/ugd/bf650e_72c8420dce0b4426b4243a535348c9e5.pdf
    • https://static.usrfiles.com/ugd/7e6083_b126f5a96f484015af788288ec651624.pdf
    • https://static.usrfiles.com/ugd/ede58b_14f6415e86f242f499825dbaff27a480.pdf
    • https://static.usrfiles.com/ugd/6cfc61_3023ead3b11d4e9793f6879569ca9a64.pdf
    • https://static.usrfiles.com/ugd/c7a620_e88ab4890e1f43dca9b522077b9cdf4b.pdf
    • https://static.usrfiles.com/ugd/d4c4cf_24119f3f5e4b44c8bd90464ae92b714b.pdf
    • https://static.usrfiles.com/ugd/defd8a_02796bb40e6a4d7eab9f434be2df5d2a.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_off00004538.bin
67e92bac39c4360efa9a4bf60191f7c997ee1b7ec4980642a36a5d6bd313c36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4538 5924 bytes
font_01_sfnt_off00005959.bin
f8076f6a4823634006ef8a7dc397ba3fcb58610e65bfaa3222c15c83ba88135d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5959 9516 bytes

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