Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1abab83f2f1f98a…

MALICIOUS

PDF

38.0 KB Created: 2020-10-31 20:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b20caac0a8b9696ba59f045a881d431f SHA-1: e0bad7bbe4f473c03ea8e97e7860639197e2417c SHA-256: f1abab83f2f1f98ad36950cc7a9205a4ce456a72ee1a8acfe7d5cf11072bbf97
94 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a free download for a popular book, which redirects to a known malicious URL. This suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect the user to a malicious site or download a payload.

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://ttraff.me/123?keyword=the+autobiography+of+gucci+mane+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f9adecf4a9cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/black_and_decker_spacemaker_toaster_oven_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5144ab93-10cf-4eb9-9c1e-e305ca893fbe/liwodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647cbcb9-a0ae-4a8f-806c-59accc1e1843/sixisokokunubivevose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284f0afd-264d-429e-bfe2-62445810c0b5/the_legend_of_zelda_collectors_edition_rom_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b4aae0-d63c-4f04-914d-e94cae049412/levinton_marine_biology_function_biodiversity_ecology.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/house_of_the_tragic_poet.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/handbook_of_aseptic_processing_and_packaging_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7370a540-1863-4b23-af93-9ffaab549457/39192258886.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/gta_vice_city_cheats_android.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_off0000549b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549B 5672 bytes
SHA-256: 1dc3a13b2182d1dc4179353f0002426c4db4c03f32b115ba7b473f334ef2a1a1
font_01_sfnt_off000067d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D6 10340 bytes
SHA-256: 5809c7978899db73fbd65498d72067e706c1fb0dd7b9c1bbc21a947f5d9d7dd9