Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf3fce51d86d9fa…

MALICIOUS

PDF

25.9 KB Created: 2020-10-25 16:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f06960b85576aa46440461698deabc87 SHA-1: 518c19c3340ade97486a0b28fc010aff267451b8 SHA-256: aaf3fce51d86d9fa0b8b1995cef015a4e2b60449a8db6e4f1258f0a45f8d6b1f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting an intent to redirect the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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=i%2527m+still+into+you
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/800671.pdf
    • https://tozarezev.weebly.com/uploads/1/3/4/3/134374844/1317227.pdf
    • https://fogajabewe.weebly.com/uploads/1/3/4/1/134131707/b42bfcc8379.pdf
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zegolanizu-bilefatesab-koxolez.pdf
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/4877954.pdf
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/lipol.pdf
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/9164784.pdf
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/fogevegorobapagez.pdf
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/sebegoboxufabi_gewikikimini_zedugagorovug_vubowogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1396283e-324c-43d2-b147-386fcaf2e0ea/ridus.pdf
    • https://uploads.strikinglycdn.com/files/9458609e-a3fb-447a-a196-d4e8b24da419/34036545926.pdf
    • https://uploads.strikinglycdn.com/files/c0e58130-2c0d-47b5-9930-086c53de59ef/42184623936.pdf
    • https://s3.amazonaws.com/rozebofukixus/baganibipoxav.pdf
    • https://s3.amazonaws.com/divexikav/concepto_de_absorbancia.pdf
    • https://s3.amazonaws.com/fasanag/lajudidolefajofaju.pdf
    • https://uploads.strikinglycdn.com/files/06fd9581-e8a1-40ec-9790-ddab6651264f/26331204053.pdf
    • https://uploads.strikinglycdn.com/files/8315196f-75fb-45d9-8a61-4f235f341008/posajufujenitipefugan.pdf
    • https://uploads.strikinglycdn.com/files/914de5b7-3719-4a15-82dd-97fbf67ac415/69105595619.pdf
    • https://uploads.strikinglycdn.com/files/33bab84d-b270-45ff-b87e-5fd31a5da9a1/rarafozila.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a01.bin
96faedc42fbb9a85337c19d6be03116b62b957f6e9b8c68a43ecfaaaa05afcf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 4596 bytes

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