Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f2e5c2581e45c1…

MALICIOUS

PDF

33.3 KB Created: 2020-10-09 05:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 723027daa1fce2d506641b2395d5d102 SHA-1: 159c3195d26d33c6515f20e4e9c0310f166196fe SHA-256: a4f2e5c2581e45c12d427ee8920373d0ca0e09e53944d4b43b71ebd629ae0e4d
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://ggtraff.ru/strik?keyword=microsoft+word+2007+learning+pdf' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=microsoft+word+2007+learning+pdf In PDF document text
    • http://files.pureblissbakeryoc.com/uploads/1/3/1/3/131398416/mukopodanibeg.pdfIn PDF document text
    • http://fulopuxus.stopplervirtualcommunications.com/uploads/1/3/1/4/131407377/4712551.pdfIn PDF document text
    • http://delenu.efjja.com/uploads/1/3/1/4/131453574/1f69a98f446bdbc.pdfIn PDF document text
    • http://vunoj.completetechnologysoftware.com/uploads/1/3/0/8/130874388/1e3b2d60b.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/1/0486/0192/3749/files/97295953243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/city_of_ember_chapter_3_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6525/2769/files/sample_invitation_letter_for_guest_speaker_in_career_guidance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6027/8949/files/mawogowojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4301d98-4b9f-474f-8e54-f6683a944d37/guvijenenadumelugujoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66c9ad8-3c59-4ed2-b277-32d46a15ebca/mibisavimopazixobavixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb02e77-ba6f-4fd9-af13-a6bb0762c112/tixufujijovakevorese.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_off0000455c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x455C 5772 bytes
SHA-256: 317300a09ba95aa2426a46472fd1eedc7fdfd886992b45e195777dbb4f2ae7c6
font_01_sfnt_off0000593d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 9228 bytes
SHA-256: 025e573ce2f80110e9c121f6dd313b923cf2531acefb8bd55476341149e9c386