Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3b034226888d42…

MALICIOUS

PDF

37.9 KB Created: 2020-11-01 16:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72fbd9a526cc4b4b6f34e2f8e0333337 SHA-1: 134fcbc397eb3cfafb62464b6277ac43c2775085 SHA-256: ba3b034226888d42854aea0407bb1b698c751d40f5ab0e39e786aa24fce93750
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. One prominent link, https://gettraff.ru/123?keyword=vampire+diaries+season+2+episode+21+123movies, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious or spam-related websites, likely for SEO poisoning or traffic generation. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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.
  • 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?keyword=vampire+diaries+season+2+episode+21+123movies
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f9e514e5fb77.pdf
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8c20b3642a4.pdf
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f8d8d1ea34c3.pdf
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f8c048607429.pdf
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/2720249.pdf
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f8f09a8c92ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/varolexexus/pokemon_ultra_sun_legendary_pokemon_guide.pdf
    • https://cdn.shopify.com/s/files/1/0501/8900/9086/files/ninevolemo.pdf
    • https://s3.amazonaws.com/tiduro/20117745480.pdf
    • https://cdn.shopify.com/s/files/1/0501/7767/1322/files/godaddy_mail_server_settings_android.pdf
    • https://cdn.shopify.com/s/files/1/0500/5839/5843/files/cheat_engine_apk_no_root_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0496/6980/0089/files/houseplants_word_whizzle_answers_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0492/3018/4601/files/884637673.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_off00004eac.bin
c03b3d8fc9d8e292a3d214c240a02dbed7faafd02b08f4ee9f6a3edc56077cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 5448 bytes
font_01_sfnt_off00006129.bin
a78c8c4ea68fc5554e5d5eeb3d425755856a65e4c84c86f82aca7795c156cd62
pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 12768 bytes