Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aab0a315acd8f2a…

MALICIOUS

PDF

34.7 KB Created: 2020-10-27 18:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0d60e41a0079b0bf4828fc8d1ec9cc2 SHA-1: 1998f7723fba52112a96fcff4f506d1b3521566b SHA-256: 8aab0a315acd8f2ad5ca604e193a6aab85f215eb6033f7cf78e15038b723487e
114 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/123?keyword=read+180+sam+educator+access'. Additionally, a callback lure heuristic suggests the document is designed to trick users into calling a phone number, consistent with phishing or tech-support scams. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?keyword=read+180+sam+educator+access
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f9054f1b60af.pdf
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f8d7e9f96925.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f889fa2a7208.pdf
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f9251fd83460.pdf
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5f971b1775855.pdf
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5f9531b8c76be.pdf
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f8a9dea86c81.pdf
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5f9395c33f03c.pdf
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f874917a0a1a.pdf
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5f9549345f4d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zirojopemup/30738456331.pdf
    • https://s3.amazonaws.com/tuzakifezara/50728605610.pdf
    • https://s3.amazonaws.com/mijedusovineti/gazetabaz.pdf
    • https://s3.amazonaws.com/vidadaviwal/autocad_14_tutorial_free_download.pdf
    • https://s3.amazonaws.com/rimepusox/credit_risk_management_theories.pdf
    • https://s3.amazonaws.com/rixevozajixezos/51713129436.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000480c.bin
b14397c19712c7ae3b0b6d84797901de19275aa12f11756c24fd83618edd7d6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x480C 5448 bytes
font_01_sfnt_off00005a76.bin
861522d9cc1d0d4db2d10594377d852766b20b10c5533b65e775e862caffca8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A76 10412 bytes