Malicious PDF — malware analysis report

Static analysis result for SHA-256 e862de1c54b50ca7…

MALICIOUS

PDF

58.4 KB Created: 2020-08-26 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d265dd55232e3d2d2ad731d40d3b4bd6 SHA-1: 15cf7a0fc2091e95bb5700124bdc66a6f84df234 SHA-256: e862de1c54b50ca735907b0e48af387e2386be2711647884bd5a3014ff6f6de1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised as a game, which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the PDF is flagged for linking to known malicious redirector infrastructure. The document body contains the lure text and the malicious URL.

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.ru/pify?keyword=torture+chamber+game+unblocked
    • http://rudirag.ryankarr.com/uploads/1/3/0/8/130813834/3a8a5d167.pdf
    • http://nasipezo.gtmhic.com/uploads/1/3/2/8/132816202/8635147.pdf
    • http://files.grassrootspulse.com/uploads/1/3/0/7/130738836/dexefe-kobafu-revapejuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/ccna_report_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/dabobaberef.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/libetipozokosukimul.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/lupepideroxejukoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/87102663536.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/football_game_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/wibujezojijugedipoxugiko.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/radazefad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/berurajujudituguduti.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_off00009ab9.bin
0663786c35ca13e8788355dddb6c8a8d10c8547d168cf293290553a1a7bc28b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB9 5328 bytes
font_01_sfnt_off0000acb4.bin
2a4296107abd4a3896887c36ccf7f959849b53a0d409876e63e8cbe3b0208b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB4 15800 bytes

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