Malicious PDF — malware analysis report

Static analysis result for SHA-256 508190b79258f53b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 07:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6baa47a7d5c972d93b92071e58a76d5 SHA-1: 539254e50f92b6b571e101bd378aa144e3d6f7e1 SHA-256: 508190b79258f53bde16880c080cbffc5082542a565e5b4d625ec3aa37d23fce
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=telugu+boy+names+starting+with+s+pdf, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains references to this redirector, suggesting a phishing or malware distribution 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://ttraff.com/pify?keyword=telugu+boy+names+starting+with+s+pdf
    • http://files.called2lead.com/uploads/1/3/2/6/132695714/fa3bfb1cd3.pdf
    • http://files.lightstarcreations.com/uploads/1/3/0/9/130969885/mogozada.pdf
    • http://files.susanaweber.com/uploads/1/3/0/9/130969896/6a72cc34665.pdf
    • http://pipebazu.landtrustscv.org/uploads/1/3/2/7/132740541/125a4.pdf
    • http://rixox.alexvanndesign.co.uk/uploads/1/3/1/4/131482995/murite.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/58017339293.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/is_ipadian_a_virus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/13601017626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/raroluwedopanorefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/28600586004.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/33203048373.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/84125889523.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7808/files/livro_epidemiologia_medronho_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/66795715733.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/am_i_insane.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/vilusapuwatupusizopujus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000522e.bin
54bf5ba55b60b4e95dfff732f7b638bf2c4a4d3ac2e9a208e7f3ab8e90949f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x522E 5736 bytes
font_01_sfnt_off0000659e.bin
561d3909fca46b69c58858c56615f0ecfcee6a84e658d5620a18e1de58609942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 4440 bytes
font_02_sfnt_off00007570.bin
85aeec824b91918b31a7953d85edac3b88b1e0062e061c6c7583513b08f4779b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7570 9780 bytes

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