Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83c6bc0e4167042…

MALICIOUS

PDF

45.9 KB Created: 2020-10-04 13:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1b5ea8bdc3b4887770d92b136aec708 SHA-1: 6366e95d042a2925f208c1176024279317b9da18 SHA-256: d83c6bc0e4167042f010edb7d1f09494330473f4a6d7a45fd51c6682c5ea2bc7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to "minimal interior design pdf" and the malicious URL, suggesting a lure to trick users into clicking on the malicious links. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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=minimal+interior+design+pdf In PDF document text
    • https://site-1042737.mozfiles.com/files/1042737/56084300551.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/87485659221.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/fekix.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/menapu.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/90505612924.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/95491405849.pdfIn PDF document text
    • http://files.thehistoriansquarterly.com/uploads/1/3/1/4/131437018/xebuzalasopikinubu.pdfIn PDF document text
    • http://gepeji.woodsidewildebeests.com/uploads/1/3/2/6/132682883/fijonuxapemozob-ledufi-mupowixodatipop-mefetilerof.pdfIn PDF document text
    • http://files.schoolofthewild.com/uploads/1/3/1/4/131437669/3443957.pdfIn PDF document text
    • http://bedebof.bobbyas.com/uploads/1/3/1/4/131437595/5666741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/tunafamubedotugufowixilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3336/4133/files/what_rule_about_the_conch_is_made.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/75784540154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/battletech_alpha_strike_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682B 5152 bytes
SHA-256: d7b031dd9d3dd40ad649305c9108bab7e5a0ff4964dae296926b8e9dbebd0074
font_01_sfnt_off00007990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 10380 bytes
SHA-256: 960f68bf351fbdf4714938514ddbbf16b35b943da4085bf3a349c6f856380889
font_02_sfnt_off00009d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D03 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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