Malicious PDF — malware analysis report

Static analysis result for SHA-256 96037e069614dc5d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 08:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f19bf2308a7a0af9606d4368f5a2c15c SHA-1: cd2633c427d77c924328042e397680432818fc57 SHA-256: 96037e069614dc5d8d330886cf6b0909354ad4eaf1bf7e7d2f2e061c7463d714
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to traff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=geometrical+isomerism+pdf+download, suggesting a lure to download further malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=geometrical+isomerism+pdf+download
    • http://files.floatingintofirst.com/uploads/1/3/2/3/132303337/ridigabununogi.pdf
    • http://files.rautoulab.com/uploads/1/3/1/8/131871535/1908271.pdf
    • http://files.nbcspringfield.org/uploads/1/3/2/3/132302732/luxulaleve_kobelaxulivomo.pdf
    • http://visewo.sudancommunitylondon.com/uploads/1/3/0/7/130776644/deporana.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/tanosodesuxuwifesasapegit.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/hurst_review_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/administracion_de_pequenas_empresas.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/oracle_pl_sql_interview_questions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/academic_writing_skills_1_teacher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/aospine_masters_series.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4093/files/6596003320.pdf
    • https://cdn.shopify.com/s/files/1/0429/4125/1747/files/manual_of_emergency_airway_management_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/kubag.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/dell_inspiron_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/halo_graphic_novel_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/tipinojugobadifutujekaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6882/4488/files/18717113728.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/poultry_diseases_and_their_treatment_book.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644f.bin
04e60aca670bb3f5f39afa17c77a6229629f73ea66f8d98a0ea6054cd1826559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 5424 bytes
font_01_sfnt_off000076bd.bin
21fd108214d22cab881e58553594c4f850978f4d178747a9c6c747e91c85d0b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 10268 bytes

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