Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcbcfe845316084…

MALICIOUS

PDF

41.8 KB Created: 2020-08-16 22:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8be71aa101315e42418b65203b44369 SHA-1: 947fce70a92b23dcb11f21d71bcb93b818d486db SHA-256: 9bcbcfe8453160841024950dfdf15a1f8b5cd4dbf34d0ae8448874eb7e06830f
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to weight loss, attempting to trick users into clicking the malicious URL. The PDF_SEO_LINK_FARM heuristic further indicates a large number of outbound links, many of which point to potentially malicious or suspicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=biggest+loser+weight+loss+calculator+spreadsheet
    • http://dalejiwov.alethearoygadbois.com/uploads/1/3/0/8/130874474/luzepujojiwikubejal.pdf
    • http://files.littlesilverems.org/uploads/1/3/1/6/131606003/nelos.pdf
    • http://files.thetrashtalkblog.com/uploads/1/3/1/4/131438532/260a7f.pdf
    • http://sezowaval.silverweed.ca/uploads/1/3/0/7/130775350/b7ed1e4f0d5dd.pdf
    • http://files.asaphteachingministry.com/uploads/1/3/1/6/131606003/4167bb9c1af96.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/sagof.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/31097879421.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/zulamotireraxuxukowon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/sujezinozovizumoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/wulipogefijadijaniwugob.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/42117564577.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/70650506312.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/icy_veins_ret_paladin_talents.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/canara_bank_neft_application_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650e.bin
698ed8bd2f457da705ffdac306e3d0c0144c0f2b9665102bbe853ea68c2dbd3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 5476 bytes
font_01_sfnt_off000077b0.bin
278a64861e049c918189507566ff5e1ecc2026d19dbdb44ca5f6c6001ca0c1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B0 10148 bytes

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