Malicious PDF — malware analysis report

Static analysis result for SHA-256 b294e85aa3bfbd12…

MALICIOUS

PDF

80.3 KB Created: 2020-11-02 18:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d5103ec2ecbd566c70910961f20973ce SHA-1: 954955075a88d3ac89293d576f4c5ac49cf9d4fa SHA-256: b294e85aa3bfbd120395d8898df75117eea91323a3d0246cd00a798755fb5553
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ggtraff.ru/strik?keyword=directions+to+summerville+sc', which is flagged as a malicious redirector. This suggests the PDF is designed to lure users to malicious infrastructure, potentially for further exploitation or phishing.

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://ggtraff.ru/strik?keyword=directions+to+summerville+sc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f898aa16c2ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f9e477f17a13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/animation_nodes_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8753/5509/files/paulie_malignaggi_boxrec_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/41483973221.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/1085886094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5468/5077/files/lonely_planet_indonesia_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2412/9437/files/33422034985.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/zenimekig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0550/9271/files/40102555440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea041c1-67f2-427e-8219-059f7fda6920/pre_order_note_7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 4796 bytes
SHA-256: 768e41d541b3f5e8568574021bf2b844cdab84c2029b600753b618dff3bbee4a
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 11260 bytes
SHA-256: 0a46d181cb26bd758ed71fea43370ca65784b1a90478db930d880758d22b46f4

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