Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e620dcc4ad351d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-20 13:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e159cf4b675b377dff7e4eb2ea656a88 SHA-1: 50964edb80deacce8703f0b6c3a7a5be7f1ba19e SHA-256: 67e620dcc4ad351d29ffbc1f006b152b27fa70901cc585ed5f2825e10caafe75
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the one flagged by the redirector heuristic. This suggests the primary purpose is to redirect users to malicious content, likely for further exploitation or phishing.

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://ttraff.cc/pify?keyword=livro+adriana+figueiredo+pdf
    • http://files.wehwoodart.com/uploads/1/3/1/4/131437969/9961645.pdf
    • http://mizopagez.beardedbomb.com/uploads/1/3/1/0/131070894/tikavoliz.pdf
    • http://nirorem.eastmen.eu/uploads/1/3/2/8/132814930/5822863.pdf
    • http://files.geometricmodel.com/uploads/1/3/0/9/130969433/tofobuxisej_tanaxi_potofoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/50999697996.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/angularjs_admin_template_themeforest.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/chota_chota_nanayuthu_female_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/ximuvapugevekudov.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/rajesukarejetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/dazolelel.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/gekumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/dungeon_master_s_guide_1979.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/tebipunutamoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0440/0090/3318/files/15210732203.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/preventive_and_breakdown_maintenance.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/windows_lock_screen_images.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_off000055db.bin
b4963fa7c4b0261d6b65dc3296dc2471e9cf6dcf31b413dae783658755cfb1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DB 5000 bytes
font_01_sfnt_off000066f5.bin
ff483ce5412978b500276396d316858cce148e7af29cd6bb0d2966edc50e6483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 10592 bytes

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