Malicious PDF — malware analysis report

Static analysis result for SHA-256 883e152ed5b224f2…

MALICIOUS

PDF

37.5 KB Created: 2020-10-02 19:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 41248145a526e5e44c7e544e5e2564af SHA-1: 7cb4a93da9bcbccf1e7be0d4a3351f3cfda49f47 SHA-256: 883e152ed5b224f29cc5da2fac4953ee79e598d2b4f3b518be7cd4191cb3f6b3
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a PDF, further supporting the malicious redirector hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=bhagavath+geetha+in+tamil+pdf+download In PDF document text
    • http://files.robinsonkindergarten.com/uploads/1/3/0/9/130969755/dupan_relamar_zoxujuseverub_bagusokus.pdfIn PDF document text
    • http://files.marywilliamsfinearts.com/uploads/1/3/1/8/131856330/4175087.pdfIn PDF document text
    • http://files.hummingbirdhummingbird.com/uploads/1/3/1/8/131856372/vajuzemoxexawitamo.pdfIn PDF document text
    • http://xelusavim.christabolain.com/uploads/1/3/1/4/131483068/rotabusezo_muzorebasoxa_rezawavikukebi.pdfIn PDF document text
    • http://files.lisajhung.com/uploads/1/3/1/4/131438693/madoku.pdfIn PDF document text
    • http://files.hceaproud.com/uploads/1/3/1/4/131453065/178080.pdfIn PDF document text
    • http://files.blankaphotography.com/uploads/1/3/2/8/132816066/29c7b902454a.pdfIn PDF document text
    • http://toxavi.mintzathletics.com/uploads/1/3/2/8/132814930/a3af5b7a5af4cfb.pdfIn PDF document text
    • http://garin.abplasticpro.com/uploads/1/3/1/4/131482992/7046972.pdfIn PDF document text
    • https://site-1038844.mozfiles.com/files/1038844/21938691241.pdfIn PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/80136651086.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/1/0485/6761/5648/files/70830818122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3015/files/sanifudutabokiginozeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9447/8500/files/fafaziwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/brigard_y_urrutia_socios.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_off0000548d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x548D 5384 bytes
SHA-256: d03b88354d5133ae4541f8b613cbe2a56dfcf21db155e55a3d0dad4526a87234
font_01_sfnt_off000066d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 10012 bytes
SHA-256: 78ed622332c18f113a6c981cee7cd9476ef738b0f827819792dd10f95672f81c

Open this report in the interactive analyzer, or submit your own file for analysis.