Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c68f76e549764f…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 06:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1214d3333e10999f43837de89c521b SHA-1: decd02fd82eb7cb37e09075cb534eefc4852d5e4 SHA-256: 86c68f76e549764f579a855d0f1624e22ac048e68207945578b635b0546d2b08
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to downloading cracked software, suggesting a lure for potentially unwanted or malicious downloads. The presence of numerous external links, as flagged by 'PDF_SEO_LINK_FARM', further supports the malicious intent of directing users to external, potentially harmful, resources.

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=download+pdf+to+excel+converter+full+version+crack
    • http://files.liverpooldesignagency.com/uploads/1/3/2/3/132303163/nidok-vijofimegisex.pdf
    • http://files.chichomeinterior.com/uploads/1/3/0/9/130969876/rigoropabowap_xemer_kuzosel_wuwipimutid.pdf
    • http://files.drtvetcare.com/uploads/1/3/0/7/130740298/2699529.pdf
    • http://files.americanautoairspecials.com/uploads/1/3/1/1/131164520/kapozamilixema_rogomitezop_pejulakun.pdf
    • http://files.rotterdamenglishspeakingtheatre.nl/uploads/1/3/0/7/130738919/wodabusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/79819227261.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/85479035808.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/suwutaterunazufefebet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/40497673410.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/56923708359.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/87179682778.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/breakthrough_plus_level_1_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/98804845897.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/flac_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/janulovogegoben.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_off00005ee8.bin
2d61217a1e5ade8886ad7e136e7a8c0c0219b982f8045983572fe158ed218157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5432 bytes
font_01_sfnt_off0000719d.bin
9224a10e583d83081ea69d9c81af0e0ca16638f061e32edf9f2c84712e6a1eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719D 14124 bytes

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