Malicious PDF — malware analysis report

Static analysis result for SHA-256 6703f2f20d565a4e…

MALICIOUS

PDF

123.8 KB Created: 2020-11-01 02:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5685ed63bc23266d94fa10598749cc SHA-1: 9f4b77679cae140df58da62ca79548cde0a69135 SHA-256: 6703f2f20d565a4e695f0409af32bbb12b125815d837fca8d1ad50601bd875e9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to lure users with a search query. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the heuristic findings, suggesting a phishing or scam attempt.

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.cc/123?keyword=operations+management+heizer+pdf
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f910d7e80b4d.pdf
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/63e2a690eb16.pdf
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/1312485.pdf
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/4785052.pdf
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/tanonusoromemog.pdf
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/suzuvevat_wasalomux_papuwitu.pdf
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f884edf5d6cd.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8856438c7f8.pdf
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f9ac9ec72087.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c99638f5-6564-4c6e-a6ff-e0140f1031a0/66171901819.pdf
    • https://cdn.shopify.com/s/files/1/0494/5575/9527/files/xebifepogetexu.pdf
    • https://uploads.strikinglycdn.com/files/02e635d7-9f3c-4787-b204-832eea28d568/nilodib.pdf
    • https://uploads.strikinglycdn.com/files/49ce1e5f-573e-4e8a-ba8c-cc1ed260c14f/82837932982.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a64e.bin
8ae88087cf2868fff9f66716811ed5fa9bf0780ac5b293ac5db65d5db9313437
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A64E 5500 bytes
font_01_sfnt_off0001b8df.bin
d4367369ca155dfb746fcd11af49918282baea39b047be348a2e0d8ec05033e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8DF 11840 bytes