Malicious PDF — malware analysis report

Static analysis result for SHA-256 890297f64ad63eb2…

MALICIOUS

PDF

45.6 KB Created: 2020-09-18 09:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faad7742766371caa6a9f09256942f97 SHA-1: da9450f10bc61cffa2155c8226a400fa5aba5207 SHA-256: 890297f64ad63eb25e2e39efea57734586e5bf8e839d0ff2324fea63c82b8312
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.club/wix?keyword=glencoe+earth+science+workbook+pdf. The document body, though malformed, contains text suggesting a lure related to educational materials. The presence of numerous links to external PDF files, many hosted on file-sharing services, indicates a link farm designed to obscure the ultimate malicious destination.

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.club/wix?keyword=glencoe+earth+science+workbook+pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://kavuzogu.kelseyskeys.com/uploads/1/3/2/6/132682883/nugejufuzusunuz_kasom.pdf
    • http://jikepak.choiceokoro.com/uploads/1/3/2/8/132816066/biluve_wutujis_mavikiz.pdf
    • http://files.kasiawolyn.com/uploads/1/3/1/3/131383453/4602811.pdf
    • https://1d433295-81ff-459f-aa12-364892126a8f.filesusr.com/ugd/227d0f_8f1b5a5c4c4c431a9290aed9f823e43b.pdf?index=true
    • https://970a87bf-addb-4bb1-9fc6-97941262d760.filesusr.com/ugd/f3bfbb_f49bcfc37fa5430eb1703639e55dfee8.pdf?index=true
    • https://749771aa-90ff-488e-8c81-80a32f54a4fb.filesusr.com/ugd/ce77c6_758ca34029fb4a48b3387b3ef0305e3a.pdf?index=true
    • https://4cfeb98e-4700-4b61-9997-6202dd7ba323.filesusr.com/ugd/035627_ae7e063bdf6246c9b24be5ab71f3a4f4.pdf?index=true
    • https://c2b6a526-6e40-49be-8f4d-41cbc9f11748.filesusr.com/ugd/e2f7e1_0157f17b926c49e0ad4afbc0ed4f23f4.pdf?index=true
    • https://6d447bd3-ead4-435f-86ee-ba3387317813.filesusr.com/ugd/2d1648_dd2b863e6c7a4afca97302773ca25c8f.pdf?index=true
    • https://90a9d72a-93ee-45c6-b273-ffb7a9762ec8.filesusr.com/ugd/838e7e_c2181fae0e504f2f8963aad10854c5e8.pdf?index=true
    • https://3faa62c5-37b2-452c-9e80-599b696c6cbc.filesusr.com/ugd/8a9bcc_d5bd63693aef489d926ce8e53e75b162.pdf?index=true
    • https://ffc62988-6def-41ed-9e56-8b26cc4a3500.filesusr.com/ugd/3225da_4c6fde3126bf45c6b3f17e3b18471d38.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0450/2791/7974/files/us_army_bugle_calls.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/16664771943.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/54971729865.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_off0000733b.bin
9fdcb14054589dc79542882010a3321e1f7776910d237f4aa75850399cd2f5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 5572 bytes
font_01_sfnt_off0000863a.bin
5f0e33b7d11ca4b15bda0ffcd360070e406aba086d9cfedbba487e41f6eecf98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863A 10352 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.