Malicious PDF — malware analysis report

Static analysis result for SHA-256 e463fdabfc1952ec…

MALICIOUS

PDF

38.2 KB Created: 2020-09-06 19:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: da6c553caf63bbb510635f4823e06c47 SHA-1: eb963d0c48e144fbc72f3b9267a8b369ebd7fdde SHA-256: e463fdabfc1952eca24e0629d243c6b80775d22f77dc15322b89b58e97a2ab20
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL is designed to lure users into clicking it, likely leading to a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=dates+in+english+exercises+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f1537bbddb36496ba8d58b19bf8e11e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e6092c_6eecf566ecc643d38b34c4ab586722ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bbd3cf_7570227adbcb4ca0b371e8ca795262c9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5377/7045/files/adobe_acrobat_reader_5._0_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/wazoniz.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/565485_5b3b371831a048ffb0920e7d6a66f7f1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b972d5_60e5a7e090df42a79240bce482172f50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/bubble_game_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0544/2210/files/27012309129.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_off00004fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCB 5484 bytes
SHA-256: c6c14f5f5d21997c509cf7fd6a1ed430f50bfff415e3a53f364ef3851ac6e5f5
font_01_sfnt_off0000627b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 13356 bytes
SHA-256: d7b22bb582f8b77f3cf2738b1b8c6e8269078e6969ec53ebc48b77783705ed46

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