Malicious PDF — malware analysis report

Static analysis result for SHA-256 823d604e82f85207…

MALICIOUS

PDF

54.3 KB Created: 2020-10-04 13:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 745ea59759febfb8c7724585b549daff SHA-1: cd2b972aea0bd023e8b7caa1d5d6419e0371334e SHA-256: 823d604e82f85207d4573d16166d5379211f36bdcfafabc87f654227ba8d7465
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it leads to known malicious redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/strik?keyword=pokemon+blazed+glazed+patched+rom, which is likely part of a link farm designed to attract traffic. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to redirect users to malicious content, 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://cctraff.ru/strik?keyword=pokemon+blazed+glazed+patched+rom In PDF document text
    • http://files.4thoughtpsychology.com.au/uploads/1/3/1/3/131384436/javafiposat.pdfIn PDF document text
    • http://files.designfea.com/uploads/1/3/2/6/132681558/43c9bbac.pdfIn PDF document text
    • http://files.annegreenwood.net/uploads/1/3/1/4/131413678/nexemekero-tasaxasinumer.pdfIn PDF document text
    • http://files.pierrepaulbitton.net/uploads/1/3/2/7/132712447/jutapolopalozonorap.pdfIn PDF document text
    • http://gitozupoz.crystallinn.com/uploads/1/3/0/7/130738578/tobemivudidun-lodirepifujel-lusexapinogekek-nalisizepup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e6b7c5-6fed-45c0-87df-40c3936d6cc3/puzewalejobejunutipij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6015500f-8128-4757-9e64-acf092c2f33c/gezixukavutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72ccb39-eaa9-4ed7-b21a-2aafed7a9d60/16866095956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9e1376-9a1e-424d-a1d5-f516bfcd5c8e/kiwovibuwabolukoruwuturig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65464f89-a9f1-4015-8b4a-a7a2363861ff/zobolinekiriget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8f3e32-cb37-4b4f-98cb-bacd4286f82a/pubudozufezobofad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb02342d-0a8c-46dc-9f7f-6db344ca9b17/47421865075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1812/0099/files/best_buy_bluetooth_adapter_for_car.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0263/8748/files/71376469100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4036/9571/files/cengagenow_accounting_homework_answers_chapter_2.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_off000095b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B9 5564 bytes
SHA-256: b81857b0bfc6abc9e37938037f9dd961c88f94a26cad0b484d3cf7ab6b25b071
font_01_sfnt_off0000a887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA887 10328 bytes
SHA-256: f9cee6b8c01c14cc8da182bca795bbe4af0e1fdfc749dd8c247684ea8e925a63

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