Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d94b292ff605d9…

MALICIOUS

PDF

73.2 KB Created: 2021-01-12 19:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a5e8753459775264df877c86a03859eb SHA-1: f223dbb67a9b09578644296d6ad922954230af14 SHA-256: d2d94b292ff605d9252e3fd7f301e7cc64a58b725f841e876c994e8a4c990af2
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://traffine.ru/123?utm_term=ragnarok+eternal+love+leveling+guide+acolyte, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to a game leveling guide, suggesting a lure to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffine.ru/123?utm_term=ragnarok+eternal+love+leveling+guide+acolyte In PDF document text
    • https://site-1187467.mozfiles.com/files/1187467/pictoword_level_462.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/jufanafapavesonikakofa.pdfIn PDF document text
    • https://site-1173505.mozfiles.com/files/1173505/jeluwisubedojaza.pdfIn PDF document text
    • https://site-1194434.mozfiles.com/files/1194434/24025562041.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/ChhhJgh/world_of_warcraft_first_game_release_date.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/23_1_specialized_tissues_in_plants.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/gdNgjhe/pitipamo.pdfIn PDF document text
    • https://site-1176438.mozfiles.com/files/1176438/togif.pdfIn PDF document text
    • https://site-1168409.mozfiles.com/files/1168409/judge_timothy_batten.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/ix8icif/murakuzufuradokoze.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/gAKhdRA/kuluvivoximiduz.pdfIn PDF document text
    • https://site-1173682.mozfiles.com/files/1173682/vidmate_app_google_play_store.pdfIn PDF document text
    • https://site-1168326.mozfiles.com/files/1168326/91166677638.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/jeduzizonox/cps_reporting_number_washington_state.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/60536574408.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/zinus_platform_bed_canada.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_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 5160 bytes
SHA-256: 09f80f2a5bc4dc8f6a2d3fc299204eb011cf27bb003014f6ffa928fce6371f60
font_01_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 11368 bytes
SHA-256: e4edfbd7f4d8761f42d127890d96dddd7a76ba87a30260283e591602b662567c

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