Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8cfdf484c60a63…

MALICIOUS

PDF

40.6 KB Created: 2020-11-02 17:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4215ce36a8d45382b0e180d3e7ecc093 SHA-1: e7de82eec5db0a74e5a45d46739154abf2f8a3f0 SHA-256: 1a8cfdf484c60a63886995a8212ea83f3f6e285c42fdf0df6c072c27d5e7e605
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure ('lg tribute royal user manual'). The presence of a large number of outbound links suggests a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?keyword=lg+tribute+royal+user+manual
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/2b0aae7ae.pdf
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/2763505.pdf
    • https://walutosewog.weebly.com/uploads/1/3/4/3/134312240/221314.pdf
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/zuzokarasig.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/pizudi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9fafc700-bc16-44c6-bb49-5c8ac48fc660/51758854831.pdf
    • https://uploads.strikinglycdn.com/files/2ad85f82-2972-467f-9b77-beb4d6d6b020/73275536162.pdf
    • https://s3.amazonaws.com/lulelepese/hacks_for_my_singing_monsters_dawn_of_fire.pdf
    • https://s3.amazonaws.com/jojitagifuva/24277892006.pdf
    • https://s3.amazonaws.com/jeromopelurab/eso_clothier_survey_stormhaven.pdf
    • https://s3.amazonaws.com/felasorarabipis/square_of_numbers_from_1_to_50.pdf
    • https://uploads.strikinglycdn.com/files/def6830b-744a-4474-9664-fe41a9d5dcd3/gigavonesivufumisebut.pdf
    • https://s3.amazonaws.com/mamibis/vizio_sb3851-c0_manual.pdf
    • https://s3.amazonaws.com/tobobowu/barmac_crusher.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e5f.bin
4ff4850e1ac628269cfa6266ec40ec22f33b62b1bdd416e0956373c241ad1e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 5188 bytes
font_01_sfnt_off00006ffe.bin
2ee78a3a5dcbfad80e032ccfa5e7066318f5b78b1eafac77501231eada80f4f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 10908 bytes

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