Malicious PDF — malware analysis report

Static analysis result for SHA-256 70be0d04de1218b6…

MALICIOUS

PDF

34.6 KB Created: 2020-08-28 11:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e2eb3992a1f96f839b807d5c82b254 SHA-1: 0742687b1632c8a1ce314060f1cf7f57a58eb99b SHA-256: 70be0d04de1218b6ec4b2f8fcff95a82a0f99d4b360d410fcfa23e03ca4bd3be
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, masquerading as a document about "Oh hanukkah piano sheet music", that point to a malicious redirector. The primary malicious URL identified is https://ttraff.me/pify?keyword=oh+hanukkah+piano+sheet+music, which is likely used to funnel victims to further malicious content. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.me/pify?keyword=oh+hanukkah+piano+sheet+music
    • http://files.nickwinter.co.uk/uploads/1/3/0/9/130968921/fonozexejibobefetepu.pdf
    • http://mowatek.crawlspaceencapsulations.com/uploads/1/3/0/7/130776088/pebimifubojexaz-gotuvisejipegi-toxitutubonimer.pdf
    • http://files.agentemily.com/uploads/1/3/1/3/131380341/3459837.pdf
    • http://files.finethings4u.co.uk/uploads/1/3/1/4/131483149/71fa521e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/95758930823.pdf
    • https://cdn.shopify.com/s/files/1/0437/6546/5245/files/compliance_auditor_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/brewers_home_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/fumela.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/ninapigepufukira.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/paris_agreement_on_climate_change.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/skyrim_book_of_silence.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/general_anatomy_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/minecraft_build_planner.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/34132174055.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_off00004a13.bin
22e39cd2154cca3a604d41d73a71969032fd4265cf2ae703cd112c46f9cd50ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A13 5136 bytes
font_01_sfnt_off00005b62.bin
b09684e1120b0671a4f5bf76b0cb926129d88ddacb04f4f0467491c3a0d9c909
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B62 9976 bytes