Malicious PDF — malware analysis report

Static analysis result for SHA-256 a569f54e856731aa…

MALICIOUS

PDF

53.4 KB Created: 2020-11-03 18:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c7f33e1b76ea369327a2223c604a4f73 SHA-1: 9864afe30b6e2ab2dc4a47303358d401a8e78734 SHA-256: a569f54e856731aafdbcfcab2965bb46aeeacd770cdd4b5d3549a3a96c4a6f26
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'cctraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of a large number of external PDF links also indicates a link farm or SEO poisoning attempt.

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/123?keyword=one+piece+stampede+watch+online In PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/d1e262a80f474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f91134bc907b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7deac65-38ef-4206-94a9-ab5d1b724f48/.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/17883421532.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/68509234680.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/bohemian_rhapsody_piano_scribd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c64aafe-8977-4532-82c4-0416d99bb8fb/96_camaro_ss_wheels.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/48431226359.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/adobe_premiere_pro_cs5.5_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/written_treatments_for_documentaries.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/pafojawuluvozozoposigeb.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/freddie_freeloader_drum_transcription.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/chemical_burns_first_aid.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/banking_awareness_arihant.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_off0000920a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 5336 bytes
SHA-256: 95ab489c91d283261f7a0468f895607835a6616cbe7752e4fdc187027246eca5
font_01_sfnt_off0000a41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA41A 10664 bytes
SHA-256: b9479e05ecee454d383dec25b2521f14aac1ac00eff66d5f7fe5e0e243c4b56f

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