Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a1ebe3df077a34…

MALICIOUS

PDF

42.8 KB Created: 2020-09-05 01:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfa0b927b2d90d7353283e4830b538e SHA-1: 7ce35e38e15f38a96703a71cdf754537f733efdd SHA-256: 49a1ebe3df077a34844a9945a160ef482bdc60b66e34731a7a768ea3896aac4e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, including one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'editable halloween party poster template'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The presence of multiple links to external PDFs, some of which are benign, suggests a link farm or SEO poisoning tactic to increase visibility.

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.link/wix?keyword=editable+halloween+party+poster+template
    • https://static.usrfiles.com/ugd/12f4eb_12bd2092d93b42f984ebc765211e78e6.pdf
    • https://static.usrfiles.com/ugd/440e29_a538175948074137894515253c63cb99.pdf
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
    • https://static.usrfiles.com/ugd/96bf9d_e53a6713063d49879bf4e1028148d75e.pdf
    • https://static.usrfiles.com/ugd/b8c837_490aa790dd5a4d7a8d9506a8d4864a6d.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/64576009060.pdf
    • https://static.usrfiles.com/ugd/f523c3_8e227e659e574215948198306c49986b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce1e48244c014206ba6b39bce20c7902.pdf
    • https://static.usrfiles.com/ugd/a382ee_1ca85510461441ddbc3e22458d50f323.pdf
    • https://static.usrfiles.com/ugd/784815_a973eac035104286ab5a5c09f428a132.pdf
    • https://static.usrfiles.com/ugd/30ea26_a618a32b7e4640e0bee3b7c285ea0a78.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_off00006722.bin
10ecbfc98b8d9f7607542aaf5f2b36f747393bad7ac3d4f85c6847f715471ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 5488 bytes
font_01_sfnt_off000079b2.bin
ca8880603e77143a59ee6b95d86095297768a6cb3e78dc33cc53325ac8efc049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 10740 bytes

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