Malicious PDF — malware analysis report

Static analysis result for SHA-256 24507f4a8bab0bad…

MALICIOUS

PDF

57.8 KB Created: 2020-10-12 05:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc10337cad907ffaeb0f57adfd2ea2b SHA-1: 488dcfd46ddd93d9cee7d571b32f049152ed14c0 SHA-256: 24507f4a8bab0bad41ab18767cb0a21aa0bcc1b4a765854efcbd3008c9e80ab7
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs point to domains known for distributing malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that is likely part of the malicious infrastructure.

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://ggtraff.ru/pify?keyword=international+trade+and+investment+theories
    • http://tugof.chiciconic.com/uploads/1/3/1/6/131637218/lajejimitodopukuweno.pdf
    • http://files.samanthaleal.com/uploads/1/3/1/8/131857966/2540296.pdf
    • http://wemanobew.upstagenydanceacademy.com/uploads/1/3/0/9/130969525/lapubodujexu-pejitug-vanutizoju.pdf
    • http://files.shivarahimi.com/uploads/1/3/0/8/130873851/nexanesejoko-kuvazivusoka.pdf
    • http://nupovi.allendaleunionchapel.com/uploads/1/3/1/3/131384306/lazodenop-betuxivesemosax.pdf
    • http://dakifuto.charlarae.com/uploads/1/3/0/9/130968961/00d1fb8f6e33.pdf
    • http://files.bristowmethodist.org/uploads/1/3/0/7/130740084/bojagigi-katesogo.pdf
    • http://nupovi.allendaleunionchapel
    • https://uploads.strikinglycdn.com/files/4c6bee4f-915a-4b78-be74-8764bc581908/kafarazajifobufufa.pdf
    • https://uploads.strikinglycdn.com/files/435743a6-1f7b-4973-abea-1794c19519a1/rurupakamanaxazutisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/49570244789.pdf
    • https://cdn.shopify.com/s/files/1/0483/3299/6771/files/allusions_in_lord_of_the_flies.pdf
    • https://cdn.shopify.com/s/files/1/0481/7898/7165/files/jonagipoboma.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/telonopabijojidala.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_off000096a4.bin
72f97a501d549926e3db304afbcfda79c1cde93fc477b6215e1f1aa4d479d8cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A4 4852 bytes
font_01_sfnt_off0000a6e8.bin
20a55b2654b84e34056019af632ba15f3e9f0dfd48686b2bc02db30a8fd23592		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E8 10704 bytes
font_02_sfnt_off0000cb7b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 4324 bytes

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