Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc287abb6929c66b…

MALICIOUS

PDF

128.7 KB Created: 2021-01-16 17:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e25936bdb96d7bbacc227403ab9736bc SHA-1: 8fcf7dc651eee59b38cd0257471905e566d58550 SHA-256: cc287abb6929c66b3f172b6811a0d5da07032068d993006ec0834e66e1cb88fb
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically indicating it's a redirector link to malicious infrastructure. The embedded URLs, such as 'https://gettraff.ru/123?utm_term=what+is+a+fae+in+mythology', are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=what+is+a+fae+in+mythology In PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/cbe103c6e6cab40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_5fcd27b7689c0.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4413828.pdfIn PDF document text
    • https://jokonufukitis.weebly.com/uploads/1/3/4/3/134399540/fibaromoxevupufumexo.pdfIn PDF document text
    • https://site-1172403.mozfiles.com/files/1172403/spanish_motorcycle_racing_championship.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_5fdb2e9973ee0.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/xorini_wajediwapa.pdfIn PDF document text
    • https://site-1174433.mozfiles.com/files/1174433/street_fighter_iv_apkpure.pdfIn PDF document text
    • https://site-1171131.mozfiles.com/files/1171131/22092597365.pdfIn PDF document text
    • https://site-1251254.mozfiles.com/files/1251254/74985050360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_60029a1b6cd16.pdfIn PDF document text
    • https://legukofa.weebly.com/uploads/1/3/5/3/135318177/sotej_pukara_rijuwejenawobe_delamugabefoguk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ff238ad85b39.pdfIn PDF document text
    • https://site-1200692.mozfiles.com/files/1200692/43312207782.pdfIn PDF document text
    • https://site-1168098.mozfiles.com/files/1168098/free_music_software_for_chromebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/padadutiseni/95809257342.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/wallpaper_app_for_windows_10.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001ba01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BA01 26300 bytes
SHA-256: 9a2a17800023c5c1e282af3242c6683422c9f865d816d27d666620321b832888
font_00_sfnt_off000181d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181D9 4988 bytes
SHA-256: 7c58422b965852ec01eaa4a75c5dca021fadbd3b87ada24b4027606c6c47a466
font_01_sfnt_off000192b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192B7 11868 bytes
SHA-256: ca03be19eef242b84a73ac6c227878f6d096a6735bd2d5640a51d79fc4838c8b
font_03_sfnt_off0001e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E69D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361