Malicious PDF — malware analysis report

Static analysis result for SHA-256 d888bd9d28c3ad3d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-26 14:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2d4c46d03e32c30ffac42ebe9fcfaa4 SHA-1: f5bcf209477cb5886368a7f5bbaaccbe6d5c93a8 SHA-256: d888bd9d28c3ad3d513d77c5f0394aff09cc057eedc4f629ff019d09dd96e452
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.ru'. This URL is part of a link farm designed to deceive users into downloading files, masquerading as a free PDF. The document body also contains the same lure text and URLs, reinforcing the social engineering aspect. No scripts were extracted, but the primary attack vector is the malicious redirection.

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=the+little+book+of+valuation+free+pdf
    • http://givovudu.quietlyjudging.com/uploads/1/3/1/4/131436967/sumironese.pdf
    • http://files.ashlynnsboutique.com/uploads/1/3/0/7/130739340/d87cff3.pdf
    • http://files.relst-uhag66.com/uploads/1/3/1/8/131871644/9267640.pdf
    • http://fixoroka.thearmwrestlingarchives.com/uploads/1/3/1/6/131606490/5521170.pdf
    • http://direbega.glomcdonald.com/uploads/1/3/1/4/131437423/kibewewe_xesuwonu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7011/8302/files/zomidogagafapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/papyrus_sprite_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/zexawederilolefokedig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/88667310535.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/sopuravulago.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/kepolenorazozujofixovax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/gexawubumibutefozasesut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/rewaxonoladudizetexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/kobebajizikipewataxojixup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/60036514746.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_off00006c7a.bin
3e2ea0632eb68df75ffb1b722296e3aee3e4f75146959114e0a76be44409a4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 5044 bytes
font_01_sfnt_off00007d8c.bin
562b97c7dd8ff52d2027dcb3d54eef6cf0cdb25a98d6e569819ab1ce2eeae421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 10192 bytes
font_02_sfnt_off0000a060.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA060 4324 bytes

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