Malicious PDF — malware analysis report

Static analysis result for SHA-256 98139a324c0e977b…

MALICIOUS

PDF

58.0 KB Created: 2020-08-20 05:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e54d95936c601c2323325db8d312364 SHA-1: 23873c8d34bcc27742c39e4065a925478ba6645a SHA-256: 98139a324c0e977b2fec24ee123dd0e8bbb6a1855006a3e044cb80f5e3e99e96
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=lions+clubs+international+fact+sheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL as the malicious redirector.

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.cc/pify?keyword=lions+clubs+international+fact+sheet
    • http://files.pjeterkoleci.com/uploads/1/3/2/6/132681938/f414f68e3faf.pdf
    • http://files.libationmarin.com/uploads/1/3/0/8/130874284/bevosuzu.pdf
    • http://nuvamili.therealestatestagingstudio.com/uploads/1/3/2/6/132681947/4642328.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/37154170945.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/10170956559.pdf
    • https://cdn.shopify.com/s/files/1/0436/6509/6857/files/analise_do_poema_autopsicografia.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/converting_currency_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2988/files/87987164535.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/dipalixaxalus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/98978465745.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/83567922850.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/51422071743.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_off000099bf.bin
2e6ea3547f507946a03136067f56d5f723e7544c33e1e1882624b4c493bb8b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BF 5052 bytes
font_01_sfnt_off0000aadf.bin
548fedfe6d9bf1de28a894aa80b021b5a6b20b9a9d2fc6430ee94850a6393994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAADF 15484 bytes

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