Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1f9d766f9db1e2…

MALICIOUS

PDF

56.1 KB Created: 2020-08-20 14:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed3cb3b97f48462de55556ad044b2e3f SHA-1: b7ed386a4661cef618f9795bfda66af796b6849e SHA-256: 0c1f9d766f9db1e269ece6d310b823f061ca16d07214afc1e831787bc52a08e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm and a malicious redirector URL, suggesting it is designed to lead users to harmful content. The primary malicious URL identified is https://ttraff.com/pify?keyword=harvard+referencing+guide+deakin+university, which is used to redirect users. The document's structure and embedded links indicate a phishing or scam attempt, likely to distribute further malware or lead to fraudulent content.

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/pify?keyword=harvard+referencing+guide+deakin+university
    • http://files.mimisclothier.com/uploads/1/3/1/4/131410747/wazilesuri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/17544346621.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/zobami.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/mesepafap.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/nakiretetolimoxogamoruged.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/90313837217.pdf
    • https://cdn.shopify.com/s/files/1/0437/9013/9549/files/18076085734.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4357/files/nigojaguxalazemojaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/canon_7d_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/m3u8_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/zorunakurilid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/lp_anoreksia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/mesalas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/verarosuparekiladavib.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_off00009d01.bin
658f455077e8962b6c14cbabc60cb37fb76c628d2a9bf4e94979cecd08c9c50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D01 5344 bytes
font_01_sfnt_off0000af4c.bin
2a9a5831e9b708c6208f19f508f0a43c8e6be5dcf8a5a1c25c030c18dc29c101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4C 10628 bytes

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