Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e4270ca03d4685…

MALICIOUS

PDF

76.9 KB Created: 2021-01-08 08:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e6187b4ac4dbc3c03b765650239e9be SHA-1: efb22992091c023ea048fc00096de688859f55ca SHA-256: f6e4270ca03d4685ce5e5e4a4df0639572749a2f4186e990a92ddd55df8243c8
162 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 'ggtraff.ru'. The ML classifier also flagged the PDF with high confidence. The document body, though heavily obfuscated, contains text that suggests an urgency lure, which is a common tactic in phishing campaigns. The presence of embedded URLs and the overall malicious verdict strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/aws?utm_term=vans+old+skool+checkered+platform
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5fb35459c00d7.pdf
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5fad26031419e.pdf
    • https://cdn-cms.f-static.net/uploads/4409393/normal_5fbec7d0c36e0.pdf
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f903f5094d4a.pdf
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fe236489058a.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuxepiduded/88739447401.pdf
    • https://uploads.strikinglycdn.com/files/d20cfd32-6879-4ff0-a081-5d020d6b3113/44260644279.pdf
    • https://uploads.strikinglycdn.com/files/c18ad1d2-0952-44cc-952d-e4f216abe56b/virgilio_mail_-_login_https_login.virgilio.it.pdf
    • https://s3.amazonaws.com/tedowafomaru/hollywood_movies_hd_free_sites.pdf
    • https://uploads.strikinglycdn.com/files/ef00b32e-9eb9-43ee-8faa-f797e8c36212/hot_wheels_cars_lamborghini.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d9fe.bin
1f2ca71198b537e3e029ebe39932bca11babb112739ea6cf402b989f0f643195
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD9FE 11900 bytes
font_00_sfnt_off0000c7ba.bin
238bfd1fc4799bea575ed304fbe2ebd35644f579e622f3021713330650d40b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 5424 bytes
font_02_sfnt_off0000fafb.bin
e8e0eb2f346f3b4d906b95a434e9e0b454a5dbf88a147e1b3f5f26ffaa758733
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 14288 bytes