Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bde79a63fdb8bb…

MALICIOUS

PDF

34.1 KB Created: 2020-08-22 06:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca8bd4a18b74bd7e6e8556431415c52 SHA-1: 2174a00826c0458c1f5c5bd864b4d7dcfcc96ec2 SHA-256: d4bde79a63fdb8bbf446704abafdc789ad0fc13146183aab3dbc767cf870e498
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'One Piece Grand Battle 2 apkpure' and the malicious URL, suggesting a lure to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.cc/pify?keyword=one+piece+grand+battle+2+apkpure
    • http://files.996revolution.com/uploads/1/3/1/3/131380054/xetajoxidagevo.pdf
    • http://vukazid.vmclegalservices.com/uploads/1/3/1/6/131606289/rokubadezovurab.pdf
    • http://files.infusionnursesoforegon.com/uploads/1/3/0/7/130738960/kufugubukila-womobamemulor-pakasiji-bidag.pdf
    • http://xarelula.msallstatechoir.org/uploads/1/3/2/6/132695203/2501625.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/jovuweti.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/medical_fitness_certificate_format_for_kerala_government_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/vurubimeganexunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/queen_s_gambit_exchange_variation.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/buvigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/xaxuzemubezuxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/89841311787.pdf
    • https://cdn.shopify.com/s/files/1/0432/9196/7646/files/recourse_against_arbitral_award.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/6782726331.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/java_a_beginner_s_guide_download.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004722.bin
203c07cb90afc37ece064ad4fe1adab2fcd843e4588781ee4b81d3212d3f0837
pdf-font-stream PDF embedded font (sfnt) at offset 0x4722 5428 bytes
font_01_sfnt_off0000599a.bin
58f63856adc1fa93907ff8e753c73056efac6e3e992af7af00562d8326918ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 10036 bytes