Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3246af68b30063…

MALICIOUS

PDF

70.2 KB Created: 2020-11-24 06:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f2d42ce4a554e6c0df9150f3a243ecf SHA-1: 385639a5be660335c260828af6c416fda11077d9 SHA-256: 7a3246af68b3006319df486ecb25259bde2b55cb8e410706d4d954b6e6b965ba
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on suspicious domains or are part of a link farm designed to obscure the final destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link pointing to 'traffmen.ru', indicating malicious redirector infrastructure. The presence of multiple Weebly-hosted PDF links suggests a coordinated effort to distribute malicious content, likely for phishing or malware delivery.

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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=abc+order+worksheets+1st+grade
    • https://pitiwiju.weebly.com/uploads/1/3/4/6/134687602/gamevexe_gunun_wogoboluxumo_mebupubelesozap.pdf
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/1275552.pdf
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/d2bf5.pdf
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/9b44688aa5.pdf
    • https://fuxomiluzixoxam.weebly.com/uploads/1/3/4/5/134594746/muzakave_vedinusefupubad_zopegixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fapaga/29822192974.pdf
    • https://uploads.strikinglycdn.com/files/474a4287-79e4-401d-b8a5-6f3b18863097/36152518734.pdf
    • https://s3.amazonaws.com/newopetusam/72563803483.pdf
    • https://s3.amazonaws.com/sezewu/download_apk_ome_tv_for_pc.pdf
    • https://s3.amazonaws.com/tipikaxe/wall_mounted_cd_player_australia.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_off0000d5b5.bin
997f7391a693a60d74dd1f903cec5da9f4a541c9a89464c9c7dae42c62707bc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 5504 bytes
font_01_sfnt_off0000e880.bin
8f5d1cf102463a7daccacff1b7f31656aad69bed4c8783063aa23dc798ead9a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 10412 bytes