Malicious PDF — malware analysis report

Static analysis result for SHA-256 5006dbf93c478da8…

MALICIOUS

PDF

104.6 KB Created: 2020-11-03 04:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929b8195e3d10110921a2a0f3db3526c SHA-1: 281613d91582f46895c3a2f46266273610d81f0a SHA-256: 5006dbf93c478da86429bce578ef7772a1280201a59b5bb23a8b03d2983a8bf0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a redirector URL that is associated with malicious activity. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading software. The presence of numerous external PDF links suggests a link farm intended to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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/strik?keyword=download+chrome+portable+32+bit
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/vitifupegoraw.pdf
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/kaxobaferusatejez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vesubodufisi/redokaguwuferaz.pdf
    • https://uploads.strikinglycdn.com/files/71e37d5c-2884-4074-a401-5ee7aa2b6b37/92174133212.pdf
    • https://cdn.shopify.com/s/files/1/0508/1589/3677/files/89349280642.pdf
    • https://uploads.strikinglycdn.com/files/c8cacbcc-220c-4757-b3f7-2e79b4bb558d/making_inferences_worksheets_second.pdf
    • https://uploads.strikinglycdn.com/files/35b8a0bd-e3f2-43eb-85c8-1e0a42d5da32/23953648612.pdf
    • https://uploads.strikinglycdn.com/files/025b81fa-6a40-4805-87f7-d2673a61be82/enlisted_personnel_action_request_form_1306_7.pdf
    • https://s3.amazonaws.com/saziwijaxodav/vufusabawitupa.pdf
    • https://uploads.strikinglycdn.com/files/f803f771-89d3-4f14-a7f5-af4bbeea4340/monastic_traditions_5e_kensei.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a07.bin
c24a0cdc79b3bfb1fd2be9a20d1cc34fc893986a1b737485f3e54176c3ded3e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A07 5664 bytes

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