Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecd2525225c0097…

MALICIOUS

PDF

45.0 KB Created: 2020-09-12 17:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c164179aed6ed9b3fcd396ac971ef9ae SHA-1: fb3357d2ab621c2523cc65f953512bf2092aafb2 SHA-256: 7ecd2525225c00978240ff40f92195f10ce0b8ab319032dedd4bff5c8a918081
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'accouchement pr e matur e cong e maternit e' and embeds a link to a known malicious redirector. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=accouchement+pr%25C3%25A9matur%25C3%25A9+report+cong%25C3%25A9+maternit%25C3%25A9 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/a18aa6_9f88b1df12154aab822ed1117bb5467d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/24deb6_af20ad86e7074948b3561454dda63e34.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/762c1a_881937312ca74b2eaa6b9a6281374746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/81420300150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/boise_cascade_lvl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/rejupawafuzokujejote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/73269439588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8877/4045/files/armies_of_exigo_demo_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/89182429439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/round_number_python.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8bbd7_79000d50fd7b43e7aaef9eb1bd16f059.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/81b904_4b21fd80ae244d08b4c09740d6abd4c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fbccce_546d4c6211c847d8ad47ce834dd9afb4.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9E 5268 bytes
SHA-256: 0084293801f8d3021765b1cb2cd6923cae75c53fb56581f84d2d6f0986546d69
font_01_sfnt_off00007e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 11876 bytes
SHA-256: 4707934987fa409cce03ec61ef9d0fa16e1815cea5e9fdbe09a3069c828c080f

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