Malicious PDF — malware analysis report

Static analysis result for SHA-256 3193d55dcf36a23d…

MALICIOUS

PDF

54.2 KB Created: 2020-11-04 08:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b614d046b6e8bc942efae9df2600c106 SHA-1: 30b5b19dcd435837a63299187ddc80d8cf47a635 SHA-256: 3193d55dcf36a23d1eeb69e81e55c37a1ae2d544168f2b405f89a846c34e8a6d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/strik?keyword=rift+of+worlds+guide', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'guide' for 'Rift of worlds', a common lure for phishing or malware delivery. The presence of numerous external PDF links, including one to a potentially malicious redirector, indicates an attempt to drive traffic to malicious infrastructure.

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://cctraff.ru/strik?keyword=rift+of+worlds+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_5f9e15650367e.pdfIn PDF document text
    • https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/1121547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5f939ec947360.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/zabevog/chajja_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/equation_of_a_circle_worksheet_geometry.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/12548912655.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/the_assassination_of_jesse_james_script.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/44363694501.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/blue_point_multimeter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/fuwisorerolipazozesufirog.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/jammy_furniture_mod_curse.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/powerschool_ucps_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/basketball_legends_2020_poki.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_off00009597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9597 4964 bytes
SHA-256: 5b588340fe1192791066861db2d6e09db34a65fca3b04307770acb54ea659659
font_01_sfnt_off0000a6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A6 11040 bytes
SHA-256: 7c3aa91746f632435bc7fb78394db0b5e0bc9560f82c65267ff29cbdf6139a73

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