Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abac9415247f7c0…

MALICIOUS

PDF

41.5 KB Created: 2020-09-17 08:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f045a3985803224db8fff00401d95ea SHA-1: f592b619a018fa4d004f829660a24b72bb5406de SHA-256: 6abac9415247f7c03b67245b9430bf7252272af6795c270c18e6ea20571bcce8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the document body and heuristics suggest a lure to malicious websites, potentially for phishing or SEO spam.

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/wix?keyword=chautauqua+airlines+fleet
    • http://babetul.palmcayami.com/uploads/1/3/0/7/130738824/2c855.pdf
    • http://gufekeru.lightningridgefarms.com/uploads/1/3/0/7/130776485/9388000.pdf
    • http://files.thesmallhinge.shop/uploads/1/3/0/8/130813409/nofenezifiluta_gejoj_mugokedofazedo.pdf
    • http://files.apexrejuvenation.ca/uploads/1/3/1/4/131407549/5572454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/28171505208.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/cuisinart_convection_toaster_oven_broiler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0486/2568/0542/files/numpy_diagonal_matrix_elements.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/dufavoxedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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_off0000665c.bin
174756bc666f10e89f8ed2b22d6b7c70c3ed2610c1f5f22de2bfe409ec041cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 4888 bytes
font_01_sfnt_off000076f2.bin
6e9d77e97ea223e1c9e76182f571cb7ed383744dc8b62a2025d89a89e4ccdd04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 10176 bytes

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