Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd52b57e22afe8e…

MALICIOUS

PDF

42.0 KB Created: 2020-11-05 01:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4c0a2a8aa6952c5b967e2564e28feb SHA-1: 525622ff2f6b3304e1764ac9a82e2e7dfc03d007 SHA-256: bcd52b57e22afe8efefedce8498c3fd1eababd39fdb13b854930d82c6913df13
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a link farm designed to obscure the ultimate destination and potentially evade detection. No scripts were extracted, but the PDF structure itself facilitates the 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.club/123?keyword=rapid+identity+nc+ed+cloud+login
    • https://jitojadafolad.weebly.com/uploads/1/3/4/4/134404030/182086.pdf
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/aa71e2ccc03abd5.pdf
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/gegevilazim.pdf
    • https://ligotilup.weebly.com/uploads/1/3/4/3/134313371/6525174.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/115ebd63-5962-4703-bde1-d628282ea02a/33489835044.pdf
    • https://uploads.strikinglycdn.com/files/caf967e9-55c9-4100-a0c8-cb5cae336763/pebatiw.pdf
    • https://uploads.strikinglycdn.com/files/b84c4183-a5c7-48b2-8805-e21f71141db4/32525643238.pdf
    • https://s3.amazonaws.com/xipavir/92644415.pdf
    • https://uploads.strikinglycdn.com/files/932497bf-42bd-49ce-9b47-463ef704e13a/mugejiloxuxanoleg.pdf
    • https://uploads.strikinglycdn.com/files/6ad24589-d0d5-4bb0-bd1b-bba3e467d614/barbie_presents_thumbelina_full_movi.pdf
    • https://uploads.strikinglycdn.com/files/8e675373-c947-44b7-9aeb-64c19e2363b5/52709907951.pdf
    • https://s3.amazonaws.com/pazifetanegapu/kowekigejoletisulof.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/nagarasaremamomike.pdf
    • https://my.ncedcloud.org/
    • 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_off00006666.bin
5b919017eb01180bc0070cc4bd99e3bf61c52a33267db657ed12de8696466be3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 5076 bytes
font_01_sfnt_off000077d2.bin
603fa092fae8707711a63e6d9b1f87e7ef09607d710eb520f4193a6818af82ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 10508 bytes