Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c95fec1e48ed77…

MALICIOUS

PDF

53.5 KB Created: 2020-10-27 04:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ec9d601dde9453cc87528d4c931064 SHA-1: 109c23632c7128dba8a3687ccd5233e2320e2a19 SHA-256: 91c95fec1e48ed77ab5a36dc802755e0667f0d112bff6af7988d7c32eb4cfa11
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though obfuscated, contains a URL that appears to be part of a lure, referencing a popular actor. The presence of multiple PDF links suggests a link farm or redirection strategy to distribute malicious content.

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.com/123?keyword=kingsley+harry+potter+actor
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f91acb112741.pdf
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f8d1dcda2da1.pdf
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8d0fab54774.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f87a720ac1a6.pdf
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f8a4f61db137.pdf
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/6398451.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/maxew-tijutojekuw.pdf
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/6082316.pdf
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/480dcc2c9f4e06.pdf
    • https://jimoporifu.weebly.com/uploads/1/3/4/3/134378689/2098502.pdf
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/8d047c3d02ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0502/8193/9144/files/aptoide_lite_2.0.2_apk.pdf
    • https://uploads.strikinglycdn.com/files/a5e939e6-1c01-4936-8529-ad8f810d0cce/vuzifinamu.pdf
    • https://uploads.strikinglycdn.com/files/f056bed5-16af-483f-b611-628be54c7c78/introduccin_a_los_sistemas_de_bases_de_datos_date.pdf
    • https://uploads.strikinglycdn.com/files/32359145-5e9e-487b-87ad-7891fbc2589f/papokizabosunud.pdf
    • https://uploads.strikinglycdn.com/files/100bebf6-fa1a-4a95-ba77-a4c42bfaebac/99817041099.pdf
    • https://uploads.strikinglycdn.com/files/679d076f-733c-41ed-9c75-f509f6140b8f/.pdf
    • https://uploads.strikinglycdn.com/files/20f5485d-3466-44db-bfd7-e39a6f378bf0/26031978456.pdf
    • https://uploads.strikinglycdn.com/files/8f68d1f2-973c-4bcf-a668-0c0b938adef1/dogabani.pdf
    • https://uploads.strikinglycdn.com/files/0d5ab212-387b-4c3b-8886-927143bc6867/gapuzo.pdf
    • https://uploads.strikinglycdn.com/files/7794eac0-d158-4566-a2a9-8e266bba6e17/baxikenosele.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085fa.bin
ab77e3185ea85a1b4f44509c4fdc35bdaead128de58dfd51a6978a63a82ed5b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 5264 bytes
font_01_sfnt_off000097d9.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97D9 3720 bytes
font_02_sfnt_off0000a33c.bin
6f7c5321ccf567206ee7146caff9a3826dcb13cead744911ecd15c0e5bf4a48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33C 10852 bytes

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