Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0dca6ce070df91…

MALICIOUS

PDF

43.4 KB Created: 2020-10-11 13:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cc3df402b6ca212f592cd7b1341fcf7c SHA-1: 1b6544e7cc92372182f5913cf64f9c4070c92853 SHA-256: 3a0dca6ce070df91470900961d9be6a04bbabd244674893d8fe828e0af0ec62f
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 a link farm designed to manipulate search engine results. One prominent URL, 'https://ggtraff.ru/pify?keyword=the+water+cycle+powerpoint+worksheet+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing worksheet answers.

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/pify?keyword=the+water+cycle+powerpoint+worksheet+answers In PDF document text
    • http://mibug.sincerelycam.com/uploads/1/3/1/0/131071256/gukusuk.pdfIn PDF document text
    • http://fuxexobe.atouchofalchemytampa.com/uploads/1/3/2/6/132695636/4b1e010bb0.pdfIn PDF document text
    • http://lebovu.mcwoodturnings.com/uploads/1/3/1/3/131380550/9233931.pdfIn PDF document text
    • http://files.herzdesign.com/uploads/1/3/2/8/132815014/5e379.pdfIn PDF document text
    • http://files.bigtable.net/uploads/1/3/0/7/130739404/xipexuzogog-lutejavujiwuzu.pdfIn PDF document text
    • http://files.ldbellsoccer.com/uploads/1/3/1/6/131636689/dcc49486.pdfIn PDF document text
    • http://files.domowilliamsburg.com/uploads/1/3/1/8/131857383/8cb955cf056.pdfIn PDF document text
    • http://files.unstpartnership.com/uploads/1/3/2/7/132740692/lujowirivikubiv-xuwiw-levirazevo-pamavakikadad.pdfIn PDF document text
    • http://guwijep.team-tubes.com/uploads/1/3/1/4/131453329/nojukeposobivuv-rowotifonutusok-moruziketo-vapukikilur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/sogigivaponekejegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5311/6320/files/11905337851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9252/1383/files/mixotabisozofososomez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8558/6326/files/81523483918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/the_alchemist_25th_anniversary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95502f2c-29f3-46d5-b7e7-3d2a7679a986/86566096173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4ea139-db15-4af3-89ba-92c2d3a4cd24/40894223663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a46135-44ed-4b21-8590-66643d956d72/keleve.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_off00006c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 5228 bytes
SHA-256: b8d01504beb9663aa0d7c97250155941f982dd7901ccfdce43ee312e4ef05e43
font_01_sfnt_off00007dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 10032 bytes
SHA-256: 3b383306bb1772689f6aec7b5f60825418a5ae4a972e348c5d4deb649a6b4d11

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