Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcf18bb2840333a…

MALICIOUS

PDF

47.5 KB Created: 2020-08-21 19:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 105c9e84c5b1c90609d85d933b09b032 SHA-1: 125956c9987b22047420e1adc0ffa9c555c58299 SHA-256: 5fcf18bb2840333ae665a9bb6db2b20116263f58c1bc595e9a7447ed9af45bd2
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body text, though heavily obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=ashoka+the+great+full+movie+hd', suggesting a lure related to movie downloads. The presence of numerous PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to increase visibility. The ML classifier 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://ttraff.cc/pify?keyword=ashoka+the+great+full+movie+hd
    • http://files.myfundenver.com/uploads/1/3/0/9/130969270/4630660.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/58218997979.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/punegedokizujoniriken.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/lulefebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/lusezawubotobuwepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/lafotupelapajivari.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/this_is_amazing_grace_chords_bb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/65984066632.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/38742324825.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/metabolismo_del_alcohol_bioquimica.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/steam_code_redeem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/tefojun.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/96966669334.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/60244922351.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006509.bin
5ba99e2a14920a0a8df8f6c04dc9d64a029dc57da843b83e2fccb8e2f91ba01c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 5432 bytes
font_01_sfnt_off0000776b.bin
38722e21b5d5641bff26dab884cb6dad44683deed6606e87aae2d9c0679aa4a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 10632 bytes
font_02_sfnt_off00009c04.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C04 16164 bytes

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