Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aae7d84a53b01eb…

MALICIOUS

PDF

51.6 KB Created: 2020-11-02 01:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a5d9c53bb6e7c4c3498b3669388d788b SHA-1: e27e444729daba1fc94e44746914d0d510755143 SHA-256: 3aae7d84a53b01ebe8f36e6f7260eb71ff49935574af72e24df5301e4a068b88
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/pify?keyword=matthew+lesko+books+pdf'. This URL is embedded within the document body, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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/pify?keyword=matthew+lesko+books+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5f9b01fd13257.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/waniwijalakobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f936c71e4ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8d9a9b941f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5f95f2f6a5f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f93d17ddf35e.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/1/0503/4183/9044/files/gullybaba_ignou_mca_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3165/3273/files/picture_comprehension_worksheets_for_class_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2230/3399/files/lelapugan.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/tapunarokesimanimal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3591/6953/files/22158910004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6794/4341/files/tutelawomujitugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6715/4847/files/ssc_admit_card_2020_download.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_off00008958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8958 5336 bytes
SHA-256: 90a54f1513d3f1efaeca0e91354e854fc7c62f6ee68bf2300a8a9be1c3d7b426
font_01_sfnt_off00009b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B95 11216 bytes
SHA-256: 4cb4fecdec4dffcea2f6df1d9dbae81900816fabfab4e5328b524a1660bf5293