Malicious PDF — malware analysis report

Static analysis result for SHA-256 85344eb6d688f9f3…

MALICIOUS

PDF

40.5 KB Created: 2020-11-03 08:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3259c7d9fc343d2f4cf750d7b243d61 SHA-1: dc318a140cc8c0d3948dac82dcf58798ab084994 SHA-256: 85344eb6d688f9f313041ad38cecc3eda67e8e00dd2999a62699270d41f7a64d
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to "nba 2k mobile hack no human verification" and embeds numerous links, including a critical redirector link to `https://cctraff.ru/aws?keyword=nba+2k+mobile+hack+no+human+verification`. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/aws?keyword=nba+2k+mobile+hack+no+human+verification
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5fa0d644ba94f.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f95ec7f9adae.pdf
    • https://ganarusi.weebly.com/uploads/1/3/4/1/134109047/vixut.pdf
    • https://feriwixuwegixuf.weebly.com/uploads/1/3/4/6/134602873/618556.pdf
    • https://non-cgplus.com/nba-2k-mobile-basketball-cheats/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0504/6747/1551/files/rduire_taille_acrobat_dc.pdf
    • https://cdn.shopify.com/s/files/1/0502/6847/1445/files/kaziwasukat.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/umich_2020_acceptance_rate.pdf
    • https://cdn.shopify.com/s/files/1/0484/7134/3266/files/xujomovuzenaduvulobixoluz.pdf
    • https://cdn.shopify.com/s/files/1/0495/9505/6291/files/mopeziwax.pdf
    • https://cdn.shopify.com/s/files/1/0436/2302/2752/files/46262137900.pdf
    • https://cdn.shopify.com/s/files/1/0486/0300/5086/files/printable_primary_lined_paper.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/angulos_inscritos_y_semiinscritos_en_una_circunferencia_ejercicios.pdf
    • https://s3.amazonaws.com/nisoxow/kingroot_apk_pc_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7910/files/21309090660.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052f9.bin
57c443e51fadcf4e17649883573d609f0261764306c02f251fcb834fbb7ef863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F9 5192 bytes
font_01_sfnt_off00006482.bin
639db249076aeffc5225e94be3c0be98417c9a93e3ae21ff013c061c6a49b5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 10056 bytes
font_02_sfnt_off000086a8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 4324 bytes

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