Malicious PDF — malware analysis report

Static analysis result for SHA-256 196440eaa2085ac9…

MALICIOUS

PDF

48.5 KB Created: 2020-11-03 23:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 98860aae9388cd788311aa7b896e52ca SHA-1: 652a2b4c81f38034fb0594c5083371f41e1f0f97 SHA-256: 196440eaa2085ac94e70e9d24ab950bcf2a4ff66991eedb3e2d8db26a62a94ad
154 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious redirectors or link farms. The document body includes a URL that appears to be a lure for a free app, likely intended to trick users into clicking through to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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.link/123?keyword=kindergarten+sight+words+free+app In PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/sipaviwo-kesotaw.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/163422.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/zizomobane.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/raguxigonax_kojak_zufinawejo_joxav.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/dfc97.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/xapemowabaj.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/8090512.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/balixeboxusig-ronavixuz-jalifibiwudiba-dafus.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/2e9e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/barony_level_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/buburefetojumivuravapesob.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/2525748059.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/udel_parking_pass_cost.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_off00007eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB9 5332 bytes
SHA-256: 75136eed720df163956c059f886a67acaf75e850bb4099d07af29ea503256b83
font_01_sfnt_off000090f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F3 10544 bytes
SHA-256: cc1e6b12d4f8668d5e1623fe2088815c3a2d91397bdc2f6192e5c76daaae01cb

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