Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc2964d5b8bfed7…

MALICIOUS

PDF

47.5 KB Created: 2020-10-29 13:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f11609e98357ecf6962604275d3dd2d8 SHA-1: b2f342e4f905477938730e12c412bfae2c8fc351 SHA-256: cdc2964d5b8bfed76db990b924dcec93b4765ff0505d9d314fa9efe0c599ee70
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to a malicious domain. The primary malicious URL identified is 'https://ggtraff.ru/aws?keyword=patpet+dog+training+collar+troubleshooting', which is likely used to distribute further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the link farm behavior is a common tactic for SEO poisoning and traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=patpet+dog+training+collar+troubleshooting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f871a75a3cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f956a893983f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f870510d4c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5f94a28b84310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f9a1d2e6bf38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5f98f9722f9c5.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/5b04ca83cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f922953c12c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5f93a9678ed90.pdfIn PDF document text
    • https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/6852426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5f8be4cc36fa0.pdfIn PDF document text
    • https://berotejenikakoz.weebly.com/uploads/1/3/0/7/130775756/mevixasiza_mapafe_judiz_sowobufi.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/rulexinupuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f8b292d0045f.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/7707936.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/baxegezivumi/basic_electronics_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/4521346114.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/quadratic_functions_test_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/84703251697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3759/6085/files/first_pass_effect_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/dojeputixekadeturowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9294/0200/files/crown_him_with_many_crowns_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/estudio_del_trabajo_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/fexukeki.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/90940507461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8995/5489/files/wovabiresawu.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_off00007962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 5476 bytes
SHA-256: f7c8471495db3425be7e10c3e26d6057362929c3b44cb45c10f34596d8eb6f41
font_01_sfnt_off00008bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 10700 bytes
SHA-256: a28e2fac060e2a86d98b7ce19cc007b74d2f2e3e9414ba0723fd3b5fb29be09f

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