Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c362be3c8122e2…

MALICIOUS

PDF

68.5 KB Created: 2021-01-10 00:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f390c940e2149e4b3f338380786c074d SHA-1: 822356854b92ba98197b6a9ac5911664bc61f211 SHA-256: f2c362be3c8122e2c72f99d7fa4b4f44ce320b3a71006e1a524f1720dd6b5292
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector pointing to 'https://gettraff.ru/aws?utm_term=mix+addons+apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/aws?utm_term=mix+addons+apk In PDF document text
    • https://site-1175994.mozfiles.com/files/1175994/shark_bite_drink_joe_s_crab_shack.pdfIn PDF document text
    • https://site-1176021.mozfiles.com/files/1176021/speedometer_physics_meaning.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/puwoxavavumumiliwovirotod.pdfIn PDF document text
    • https://site-1167963.mozfiles.com/files/1167963/nda_exam_pattern_2021.pdfIn PDF document text
    • https://site-1168218.mozfiles.com/files/1168218/85912188057.pdfIn PDF document text
    • https://site-1180442.mozfiles.com/files/1180442/loxoda.pdfIn PDF document text
    • https://site-1166620.mozfiles.com/files/1166620/free_wallpapers_for_iphone_6s_plus.pdfIn PDF document text
    • https://site-1171694.mozfiles.com/files/1171694/guided_reading_activity_foundations_of_government_lesson_2.pdfIn PDF document text
    • https://site-1203080.mozfiles.com/files/1203080/lumapemedogonedekes.pdfIn PDF document text
    • https://site-1189736.mozfiles.com/files/1189736/disney_plus_subscription_support.pdfIn PDF document text
    • https://site-1176489.mozfiles.com/files/1176489/meteor_shower_over_california_tonight.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fa28956be174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovisak/reported_speech_modals_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/sinusoidal_waveform_diagram.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 4964 bytes
SHA-256: 082272e8e587a3bdea240579b29d487cd177e647ee8bef431c4356e54d8193df
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 11108 bytes
SHA-256: 9957976c270bf8acfd35bf94b55079ed8ffa65445ea3c5a4109c0f0f577aa213

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