Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f36e648ae77a2d6…

MALICIOUS

PDF

71.2 KB Created: 2020-10-28 00:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22fcaf3e8d367760cbddb8f45dc238de SHA-1: 5b927ef2ace7dc47a50030eb7f0183e03b535524 SHA-256: 4f36e648ae77a2d62ea7879621907f2118f736d66da33695ef158a8dc71af4fe
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO abuse tactic. No scripts were extracted, but the embedded links are the primary vector for malicious redirection.

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/123?keyword=jose+esteban+munoz+cruising+utopia+pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/ruxaju_kufogepax.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/dabusupuliselezeje.pdf
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/3435164.pdf
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/zatalu.pdf
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/6840245.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.pdf
    • https://dufejubodumafeb.weebly.com/uploads/1/3/4/4/134444341/cb9da975f2dd53.pdf
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/4488803.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavitokolezub/34706062647.pdf
    • https://s3.amazonaws.com/mexavofezoxi/11236673869.pdf
    • https://s3.amazonaws.com/zalomi/tupafome.pdf
    • https://s3.amazonaws.com/henghuili-files2/44744060778.pdf
    • https://s3.amazonaws.com/sugaguxagu/23094041166.pdf
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/android_facebook_full_screen_ads.pdf
    • https://s3.amazonaws.com/tadovu/upsc_anthropology_syllabus_in_hindi.pdf
    • https://s3.amazonaws.com/fosagobomap/sajimugitaxunepidobin.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/jobutuvaz.pdf
    • https://s3.amazonaws.com/jedaxopopuko/wimiwigadezevujenigimima.pdf
    • https://s3.amazonaws.com/gixawetopoli/novisevi.pdf
    • https://s3.amazonaws.com/xesigeze/elementos_de_la_caricatura_periodistica.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0ad.bin
5582c5acaf2b5e9d1e6a77eaadb6c1a9e978ef5d061d6c80bed4321f935913ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AD 5620 bytes
font_01_sfnt_off0000d3b5.bin
67255de18e3ae29c9b80d7692454e3c334e7c0996a4676a60f1539c73034998d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 11604 bytes
font_02_sfnt_off0000fa24.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 16060 bytes

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