Malicious PDF — malware analysis report

Static analysis result for SHA-256 8325b0240a2f8c16…

MALICIOUS

PDF

66.6 KB Created: 2020-12-19 00:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aab7fdf6be66ac2360cecd850a93a111 SHA-1: 830553af2fc231f687ba524a3d471d83c1928809 SHA-256: 8325b0240a2f8c1654073d7608a5fb0fbcf400f9625aee48a95c72b7d4716515
244 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and link farms, indicating a phishing or scam attempt. The primary malicious URL identified is 'https://gettraff.ru/wb?keyword=smart%20voice%20assistant%20app', which is flagged as a malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/wb?keyword=smart%20voice%20assistant%20app In PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/ledenotebap_dapaperodete_jotipetu_sijadamekebuw.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/gedawikemixon_sotanarojituxu_nawab.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/7152649.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/nudemebipir.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/sororojubedejalir.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/9380681c-3b5d-4dbe-9685-a2ef0c9b495f/suwajevezoguliketirewej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfa6592-4961-444d-a2e5-3fcb3d7afd16/bunezavibojutilegerel.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/binti_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c58d68612547ed76cd6f/t/5fc50bd19b1ed035387c2d41/1606749138106/marmoset_for_sale_missouri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f638dd4-62f6-42a4-878c-d28b807f91d5/male_ballet_dancer_height.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c355846-5880-44bc-b106-ee2523191ee3/8x12_picture_frame_hobby_lobby.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/momapekaxox.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/xufetatolopirorovekepol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60e09d8-8238-4549-be11-9f300b8bc172/things_fall_apart_study_guide_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a6f210d6a92a736d5b18/t/5fc828bf4b97230d05023ce2/1606953153542/39968126449.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_off0000c7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A1 5208 bytes
SHA-256: f008eab9d71ce7ab5eba065602c8f182bed24dda7930ec4c9fa6fd7c42aa0b44
font_01_sfnt_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 11056 bytes
SHA-256: aaa92b52ec5ad80aa38c99cf75c6a7fab300fb2b56e006d38890c98d65334b69

Open this report in the interactive analyzer, or submit your own file for analysis.