Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae320b95bc941aeb…

MALICIOUS

PDF

34.3 KB Created: 2020-08-31 03:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9771e5aeba43b836d3d3fd2cea57bacc SHA-1: ffc5f7a8439208f92cff9cd20d7604224ffb49b9 SHA-256: ae320b95bc941aebb3a73eb6bc92a11a2a1caa6b6a637807a7a3b74166d60bae
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. The presence of numerous links, including to the identified malicious redirector, suggests a link farm or redirection tactic to lead the user to malicious content. No scripts were extracted, and the PDF structure itself is the primary vector.

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=our+father+song+bethel+chords
    • https://static.usrfiles.com/ugd/4dd980_669fb3921a87449b9e92fe1f0b5019e1.pdf
    • https://static.usrfiles.com/ugd/89064d_c0e9970f19dc47f98ac1389a8b3efe18.pdf
    • https://static.usrfiles.com/ugd/d5415a_ce1f056916a6494195c49637e477b818.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e4350b43ae547118527007f65489b33.pdf
    • https://cdn.shopify.com/s/files/1/0463/0455/9261/files/wevefipixoruve.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/8016470068.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/bible_old_testament_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_8c72d69fae6945a5a57de087ca9bce93.pdf
    • https://static.usrfiles.com/ugd/cd79e3_e511acdc22494a4e952cb772454d9e6d.pdf
    • https://static.usrfiles.com/ugd/41a0b6_c4e5567062084f459e04717da23734de.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ea233189bf04c219ac4b3a37f1225a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_139045fa44014a24ac06e59f8c364058.pdf
    • https://static.usrfiles.com/ugd/8a419d_2fe25b63b86f4914acd2c5105fde5abf.pdf
    • https://static.usrfiles.com/ugd/d162e3_336cc8300e664ce092ba8baadedb383e.pdf
    • https://static.usrfiles.com/ugd/b8c837_581ea006585b4ab29b69a9eaba43713e.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_off00004878.bin
04e503fe25591bb0de982bb317fcc9b560ad0edfbd95962ea38f56d758df33c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4878 5452 bytes
font_01_sfnt_off00005af8.bin
2fdcd56bfce7da7448b621bbd6621262e154883d0960eb768ca71c13a4707f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF8 9748 bytes

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