Malicious PDF — malware analysis report

Static analysis result for SHA-256 a457b8eeeeeae58f…

MALICIOUS

PDF

40.9 KB Created: 2020-11-03 12:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: eec22a544b6f04a5672f3c3e6fb26c45 SHA-1: 75505424a1fed933bd8a6896d2c3960d775d20f1 SHA-256: a457b8eeeeeae58fd448bc0631df03881f5d062d793ac070b81757b508e98d5e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=printable+cursive+writing+alphabet+chart'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a potentially harmful site, consistent with phishing or malware delivery.

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://gettraff.ru/aws?keyword=printable+cursive+writing+alphabet+chart In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/suzixegazunow/nuwave_oven_elite_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ade0c88-9eda-464e-a0e8-9e3aa8ad798e/dawusevevujisej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc34cde4-854d-463f-b259-03bd81e4b3d5/72691329566.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/general_chemistry_2_review_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2741a87-11c1-483b-afa8-39bcb002f06d/jekonavakivef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae758344-1c3e-4e48-974b-6703dc7a59c4/lifubewi.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/types_of_marketing_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/49153949668.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/99651425200.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/ritag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91523a7f-37b3-4451-bf33-c903ca66d4ef/jefodagerusuvetefase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91544f3f-49cb-4e36-8ace-59d426695b7d/bufidepulusodutese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921a2534-a3f9-4370-8f35-744132d4c892/commutative_property_of_multiplicati.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/syarat_membuat_domisili_perusahaan.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/timulowufidurobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1f2f9e-3332-43da-8515-0742c57d2443/91520821139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1430d03-d4d6-4044-8b98-e286628e47ae/fomexetipa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000532b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532B 5260 bytes
SHA-256: de4a6fcab77c4d9aaf27e2a7cee6b455d3ad3dbf06802b13bfac726d39f6faf7
font_01_sfnt_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 9808 bytes
SHA-256: bca257a1f34d9296f9ef4083ec2bf216a8d37e80778dd06ac9f0d79728cb6ddd
font_02_sfnt_off00008698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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