Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d194bdc1bcb4082…

MALICIOUS

PDF

34.6 KB Created: 2020-11-05 06:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 56e5660b9b659f9b833ff931d9c83ee6 SHA-1: d38f581588c1c89fcfba9fb38dca4891f7a95418 SHA-256: 2d194bdc1bcb40827a4b82e93818ae3af1c227ffa818eac591b4c5c659320eeb
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/123?keyword=rca+transistor+tester+wt-501a+manual+pdf'. This URL is embedded within the document body, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, flagged as a link farm, further supports a malicious intent, likely for SEO manipulation or to obscure the primary 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.ru/123?keyword=rca+transistor+tester+wt-501a+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f8de5d5e81f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f947302b22c7.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/toguvaju/making_content_comprehensible_for_english_learners_the_siop_model_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/totadiwed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc874758-ed1b-44bc-8e9f-3a2a3522e6f4/vuxatikixamosaxivuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3064/5416/files/76652838316.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/biochemistry_stryer_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/69378947405.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/66438225014.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/bazegafajivowatekizali.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/23118131262.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/44141508143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1dd407-f17c-4fa1-a8bc-d87730288845/lonuvilalerokixef.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_off000047b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47B0 5752 bytes
SHA-256: e8827db63d176f6e72a3cb705df1885ecf3ba856da67f9830d21854e089adfb9
font_01_sfnt_off00005b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B53 9948 bytes
SHA-256: 8471f950855569e8a7a31b91b215304fcbbb1ece332a4349f02f9c20af74d18c

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