Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eb72f69acc462a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 21:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1823ba97d4f9f4ed9a5404e020a37652 SHA-1: 0149eb2759f42aef69e727c4c98ada0a14443c88 SHA-256: 05eb72f69acc462ac4cb1566296863ff5dabffe5ae81a88596e7dd2d108619e0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=brighthouse+financial+life+insurance+surrender+form`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various Shopify-hosted PDFs. The document body, though heavily obfuscated, also contains the primary malicious URL, suggesting a phishing or scam attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=brighthouse+financial+life+insurance+surrender+form
    • http://files.glaciercitygardener.com/uploads/1/3/0/8/130874246/luvem.pdf
    • http://xipabup.fasttraxathleticclub.com/uploads/1/3/1/1/131163960/329f1f56329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/legizalisebezekunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/wedobijugado.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/briggs_and_stratton_service_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/4124/6619/files/conditional_format_google_sheets_date.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/skyrim_alchemy_leveling.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/reading_and_writing_skills_module_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/57798679975.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/zapumubokanoselamopawuwug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/5569213897.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/gamecube_emulator_for_android.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_off000054b7.bin
bd1f021f2782d392aab233a1577a5b2961084d2c31126b5d556e4e7e2d6f7dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B7 5484 bytes
font_01_sfnt_off00006734.bin
fbabc7372a71493dd4e8b0aa81d1488ebf0cfaa29591b2f89659d25402d0d67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 14628 bytes

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