Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adaa15f795da83b…

MALICIOUS

PDF

46.8 KB Created: 2020-10-13 09:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b1325bc3a9b35b76f081a423abec9133 SHA-1: 73c5e2fb2623af4454e034047067677f85de1244 SHA-256: 6adaa15f795da83b3625fca357a4eb6d949eac7504b3e22ebab30d52b7fecab6
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised with a lure related to 'mobile legends layla item build guide'. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=mobile+legends+layla+item+build+guide In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.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/1/0492/7848/4636/files/zegiwuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/90603500706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4500/2657/files/phosphorus_compounds_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7487/4272/files/best_essay_writing_service_yahoo_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/37546078643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4542747-f2ff-4a59-9f35-ceda062d24bc/wamuxegasetiduwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784d5e24-3f64-4f36-9bbc-d8e45bd7e55e/85637952996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1006/0196/files/6-2_word_problem_practice_parallelograms_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9982/2754/files/lukopowesugavikod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/unblocked_games_uno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/36226784291.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_off0000792e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792E 5296 bytes
SHA-256: bacde2e89999ee62625af492a2f093aa24f312a3d13bec6493c8325c258877b8
font_01_sfnt_off00008b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 10288 bytes
SHA-256: 3595094aa1dfa1329a51235be106797a59bd23ad964080fffde5f791afdae750

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