Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a289e1f2d2a4102…

MALICIOUS

PDF

65.3 KB Created: 2020-09-29 19:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d1065b5def88a5e08b6349805e9648 SHA-1: 283541795a5f5036360acbeb46481479e1eb5320 SHA-256: 3a289e1f2d2a4102b76e4ecee104c656ae77698b512a997ce6c0986766988b94
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic firing. This suggests the primary goal is to trick the user into visiting a malicious URL, likely for further exploitation or credential harvesting.

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://cctraff.ru/strik?keyword=global+strategic+management+process+pdf
    • http://files.srpdesignstudio.com/uploads/1/3/1/3/131380213/wudes.pdf
    • http://godasa.chrbc.org/uploads/1/3/0/7/130775299/a5c89c3f.pdf
    • http://borev.womenartistsreaction.com/uploads/1/3/0/7/130775429/kupikibawot-dapamasubag-nafubukinono-rupamoxut.pdf
    • http://files.paintballprops.com/uploads/1/3/1/8/131856646/165af118f2.pdf
    • http://balikulex.mathematicsvisionproject.org/uploads/1/3/0/7/130775734/nisabatufufur.pdf
    • http://files.smartdealz365.com/uploads/1/3/1/1/131163601/6894018.pdf
    • http://zesumu.mitigationwines.com/uploads/1/3/0/7/130739169/sikozovuxab.pdf
    • http://kudugetu.chzaz.com/uploads/1/3/2/8/132814930/a0893caa6.pdf
    • http://vulak.vulturepeakmines.com/uploads/1/3/2/7/132740412/jejogoxaparugujuwe.pdf
    • https://uploads.strikinglycdn.com/files/6915f5c7-4df2-4399-b880-86729efb5774/xexexosozulul.pdf
    • https://uploads.strikinglycdn.com/files/e8275650-6bd6-4b70-b6ba-740950a8794d/sugatagelene.pdf
    • https://uploads.strikinglycdn.com/files/6bddec97-7ebd-441a-852b-f304061f5684/bemijabisep.pdf
    • https://uploads.strikinglycdn.com/files/b07a2d0e-4a98-4b08-9c4a-283bb682eca5/zagemo.pdf
    • https://uploads.strikinglycdn.com/files/6e7a87ca-fd53-4c78-bf88-16d4101c2c9d/xeguxivotuwixelonofi.pdf
    • https://uploads.strikinglycdn.com/files/eb4b0e6a-8998-400a-8ad8-caead008955c/kixoredipozol.pdf
    • https://uploads.strikinglycdn.com/files/d8aac590-69d4-4a6e-a1ba-11ceac0d73c5/33787017042.pdf
    • https://uploads.strikinglycdn.com/files/8af8dba0-fcd7-4ffa-b7d5-7101d5d875f1/pepukemumufulesoja.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_off0000c0ae.bin
2d1f9350b34fc2ca1c6ecbbe0cd7846cbbdefab61ac08f67dd4d1bcc6ec5c722
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AE 5644 bytes
font_01_sfnt_off0000d3c8.bin
096dcef38efee2a570d59f44c0bac602b51f52a76add2ededea16fabfd4a07a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 10504 bytes