Malicious PDF — malware analysis report

Static analysis result for SHA-256 047c9b81f72f16b6…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 14:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7efa3dd1cd3aad427156de8be598148 SHA-1: 268a3739bd74a3d4101edc9a6b94703bfcd30b83 SHA-256: 047c9b81f72f16b6af53284cfb1d4dccef06ca00bf465d3ac89db52274e180a8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. One prominent link, 'https://ttraff.com/pify?keyword=best+free+antivirus+apk', is flagged as malicious. The document body, though heavily obfuscated, contains similar URLs, suggesting the primary goal is to redirect users to malicious sites under the guise of offering free software.

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=best+free+antivirus+apk
    • http://zowumo.codenamestudios.com/uploads/1/3/0/7/130775320/995b9e17d599.pdf
    • http://pasowinef.materialsresearchgroup.com/uploads/1/3/0/7/130739704/d9fc0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/bajerodowepajagonizepemiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/34851670759.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/benesivijizasipinifego.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/62282719726.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7702/files/13269512902.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/92950184628.pdf
    • https://cdn.shopify.com/s/files/1/0463/2913/5265/files/wonder_woman_davido_video.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/canon_2020d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/administrador_de_dispositivos_google_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/37457956522.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/narenepigo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/73423664162.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/xonokewifiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/luwotipatulesuxoju.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_off0000648c.bin
5161583af886e60aaffcb405a5a66fc29b6ffc37873aec149987b58778652352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 5036 bytes
font_01_sfnt_off000075c9.bin
ba69adb83e593fad2aed093b773e192428510ae5c9656124f467ed9a100c2c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 10180 bytes

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