Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb8bc5dfc6e22f1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 23:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d8b8874a54bd2dd75eef9eb986766e9 SHA-1: abb06c7a68759e7db5c112c09577e972354759aa SHA-256: acb8bc5dfc6e22f1e62f03c9f6d2db808971b7ab3b4bd37ce7209879ebec16a8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this is a PDF SEO link farm, likely designed to lure users to malicious sites. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise the malicious intent. 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.ru/wix?keyword=logo+design+love+david+airey
    • https://static.usrfiles.com/ugd/238140_bb8b431ca1c8486eaca8fb79f69fc9a4.pdf
    • https://static.usrfiles.com/ugd/7598fa_493312956a794d439d9071f108eb4eaf.pdf
    • https://static.usrfiles.com/ugd/0c268c_442392d0bfda483f9529d04fc6743065.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_0021a7eb2e594cabbbb06e35196c4437.pdf
    • https://static.usrfiles.com/ugd/b8c837_984bf8d94af944ab80c531d3613b8fc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e37935dc4d40299f8cc375bb090416.pdf
    • https://static.usrfiles.com/ugd/3aca14_a9bab5bd745b432caddfef2dc80477cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde90f7483ef46718d6fc682b1c3613f.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_92b214dc9a1c4274877b3f09bccc3ff5.pdf
    • https://static.usrfiles.com/ugd/b8c837_edea0cf8e05d4029a32e84e22397f4cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_17772981c6da43f3936d302466e8daf8.pdf
    • https://static.usrfiles.com/ugd/cec570_65cf4bce587f4299854c300ffe77291b.pdf
    • https://static.usrfiles.com/ugd/b8c837_947bb5f389fb4debabc2e21b2e1a5749.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_off00007185.bin
d0c08ba4fa6dbb6db05656c2b5b8bbcaed207449ac88b9d54bac778b953aa0f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 5096 bytes
font_01_sfnt_off000082fb.bin
fd5f1a9fb2a2220212e34756cd5aa013ee557b0e9158da1d576fb20dd680eac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FB 10404 bytes

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