Malicious PDF — malware analysis report

Static analysis result for SHA-256 237e8672526379f6…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 00:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 924f72c320424e2dd9ea091edda04b84 SHA-1: 0d575226746c48e50ae3b5da9dcaab54917eb55b SHA-256: 237e8672526379f6f8cdc79885e93c97a7b44ac300e79eecfb7c6a4931d13a25
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with the malicious link. The primary attack pattern involves redirecting the user to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=liverpool+profile.+dat+dls+19
    • http://popusakow.dsynced.com/uploads/1/3/0/8/130874308/kukixerorurozaloz.pdf
    • http://lowom.crossfitunsung.com/uploads/1/3/2/6/132695675/fitonox-nelugobitenigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2193/files/26528046489.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/pevivurilegananatupowib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/zofutuwagibid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/cumulative_probability_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/zezamisixevudaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/munifogofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/64302807691.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/dovixupudojoxunivemixi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/98776682582.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059d7.bin
1ccf507eb704e668fe7ca5ca52b1d7ae0f120d1f9cdc5112d8abe4d0bc9012fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 5276 bytes
font_01_sfnt_off00006bdd.bin
4a825b61a04a637e4897e3c3a0dd30bb672ae07dbfdf5fa3591e97a2c5c7cab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDD 11032 bytes
font_02_sfnt_off000091c0.bin
b098da79dd067f31ba2c2b8c1c5e919600cd02ab140df2a372f8f699e4c507e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C0 16076 bytes

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