Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c485b558c475b1…

MALICIOUS

PDF

39.6 KB Created: 2020-10-15 06:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 85648a3ea87677f9bffa97e46b0db8fc SHA-1: dbabbdc74ac4f088cdfdb5248bb50bbb7f7c81d5 SHA-256: 39c485b558c475b146a23e84b880bd456bec8b4a1db70f22f8c44d666b1a6c51
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=i%2527m+yours+ukulele+chords+pdf In PDF document text
    • https://site-1040209.mozfiles.com/files/1040209/lapeladukotifivadikebo.pdfIn PDF document text
    • https://site-1038943.mozfiles.com/files/1038943/98775840092.pdfIn PDF document text
    • https://site-1040277.mozfiles.com/files/1040277/lenalamidezawelexejititep.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/murum_sugiz_natonajafikutiw.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/7254862.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/buvituwuke.pdfIn PDF document text
    • https://site-1039728.mozfiles.com/files/1039728/62036701206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f879cfac0b8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f87b8106e5f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86f5765467d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f87bf40eef1c.pdfIn PDF document text
    • https://site-1040005.mozfiles.com/files/1040005/luxibeferanidawusiwa.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/62028784219.pdfIn PDF document text
    • https://site-1039649.mozfiles.com/files/1039649/12850644545.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/1/0481/5329/7047/files/high_tech_high_north_county_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8419/5014/files/jevopafiwekop.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_off00005cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCA 5324 bytes
SHA-256: 43f3f343316a12afcaedfe87b16f6d3fd3c85a8e292359e8ddfe8f8012609e5c
font_01_sfnt_off00006ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED6 10096 bytes
SHA-256: f67868c34b3ae183f8f0ed3b8651c767ac0d24ee7c145fcedc0d6006719a7460

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