Malicious PDF — malware analysis report

Static analysis result for SHA-256 6269288ce890f593…

MALICIOUS

PDF

45.3 KB Created: 2020-10-10 15:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f77f0166f1315e6c61c0bf99aa7f80ad SHA-1: 740090f4950cc1917a066613fc24dcbef98cebbb SHA-256: 6269288ce890f593c2e58058fe0e7100b732a5dd75c52584676d6d3fae3251cc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to harmful content. While no scripts were directly extracted, the PDF structure itself facilitates the malicious redirection.

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.link/pify?keyword=yamcha+dragon+ball+age In PDF document text
    • http://wiwopuz.rainbowswithinreach.com/uploads/1/3/1/4/131453329/bab730d3.pdfIn PDF document text
    • http://files.dystoniadisease.net/uploads/1/3/1/4/131409717/sukefe-maripigenokoke-bujogidomejor.pdfIn PDF document text
    • http://files.theartonym.com/uploads/1/3/0/8/130813988/lamozufebugibeko.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/6486541081.pdfIn PDF document text
    • https://site-1038998.mozfiles.com/files/1038998/kajoxeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0342/7993/files/what_does_beaner_mean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/carrier_debonair_220_unlock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/xufujanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/95259705824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6065/files/dagoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9707/6135/files/vetat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/zemopevugazodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/classic_accessories_pontoon_boat_costco.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 4936 bytes
SHA-256: 668322c9be8fea8600352261233e7f5a3ead731c6acca77e233306dc7f670c89
font_01_sfnt_off0000796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 9648 bytes
SHA-256: 57d048ced4bf6842be9a375fa574b456b30459b9251392eba7940898af161f9d
font_02_sfnt_off00009a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A76 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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