Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbdd1307dcc3ce4…

MALICIOUS

PDF

41.4 KB Created: 2020-04-11 04:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7b6529b2a9a12d1fdab5609631e25657 SHA-1: 0448458a1bbf59143cc0e49b207c440c29d70e60 SHA-256: afbdd1307dcc3ce4cced43602e99f51317a9f00a1d773c56f5a58be4ef667451
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The primary external URI found is http://buttwocoffee.com/uploads/1/3/0/2/130287920/130287920.html#pdq+taxi+muncie. The document body is heavily obfuscated and contains repeated strings related to the wkhtmltopdf application, indicating it was likely generated programmatically.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://buttwocoffee.com/uploads/1/3/0/2/130287920/130287920.html#pdq+taxi+muncie
    • http://ashleygattis.com/uploads/1/3/1/0/131071210/jijosuguxedijuf.pdf
    • http://ryandavisportfolio.com/uploads/1/3/1/4/131454057/midipemukufegasepol.pdf
    • http://familytreequiltstore.com/uploads/1/3/1/3/131398025/00bf46dc05e33b6.pdf
    • http://joshua-linder.com/uploads/1/3/0/5/130588627/fbd9c.pdf
    • http://figgyandjiggydesigns.com/uploads/1/3/1/1/131163705/paberubejo.pdf
    • http://joannekakatymonzo.info/uploads/1/3/0/6/130620317/zowenejetutikat.pdf
    • http://n2.sjoachim.org/uploads/1/3/0/3/130312926/39bb81687fb2b71.pdf
    • http://irinadmihalache.info/uploads/1/3/0/3/130313436/gidoke.pdf
    • http://withlovemrsebeling.com/uploads/1/3/0/7/130739895/gonubekazazo.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_off00006e5b.bin
492f42190e03d7cbfdf6883eea8596e1338e9f31131f4f2462da3828e303d32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5B 9104 bytes
font_01_sfnt_off0000907b.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 2604 bytes

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