Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb8dca4f50a9bc5…

MALICIOUS

PDF

53.0 KB Created: 2020-08-30 12:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b530ab872b337b30fac6c602cd86eaaf SHA-1: 43af82bc9bdb7f054fd94a77fd9d3848c758ee06 SHA-256: 5cb8dca4f50a9bc5b587f5f31552294643d46d744bc5054b763fe2d5df30092e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One prominent URL, 'https://ttraff.com/wix?keyword=gta+5+cheats+xbox+360+cheat+code+central', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to game cheats and the malicious URL, suggesting a lure to distribute malware or phishing content. No scripts were extracted, but the heuristic firings strongly indicate malicious redirection and link farming behavior.

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/wix?keyword=gta+5+cheats+xbox+360+cheat+code+central
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/544c7e_ee4fc1be00914e8fa2354d91900e7afd.pdf
    • https://static.usrfiles.com/ugd/97634b_216f77a7389c4377b427c1998857f9a2.pdf
    • https://static.usrfiles.com/ugd/d01287_42e8701e5a4742df99d7b79d432d71c0.pdf
    • https://static.usrfiles.com/ugd/76156b_5583b203b89a411296c26bd8410c5a23.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f4e6544b96047e3bf7733c0636dc461.pdf
    • https://static.usrfiles.com/ugd/ea2f88_c185d3d2d4a64305aefcb9b4dd0bdc52.pdf
    • https://static.usrfiles.com/ugd/83b1b3_51da31253c4f46b7a728b7d486b3cea0.pdf
    • https://cdn.shopify.com/s/files/1/0457/8190/9660/files/albanie_tourisme_formalits.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/sotasilitijuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/undertale_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/63187372628.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/fifunudek.pdf
    • https://cdn.shopify.com/s/files/1/0463/4705/9361/files/sosiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/feutre_anti_condensation_autocollant.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/wedding_slideshow_after_effects_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/riremopibumotigevojexolep.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082a6.bin
7e7e046d85853808b8009e8f6e18be590f0015290f6d4ec08905799facdc6cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A6 5848 bytes
font_01_sfnt_off00009681.bin
f28d8a6f63462f8a5731de2531bc42a27ef4c478b05f0ce266b5e966673f2692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9681 15708 bytes

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