Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc9a044f03560cd…

MALICIOUS

PDF

42.1 KB Created: 2020-10-28 23:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a7c8bb59ea46cd8f4eecab6e8126ce3 SHA-1: 91d63103469c4078c7519100834f047002191e5f SHA-256: 2cc9a044f03560cd00ca05b69d8f56ccd816d1f07260b8f786848e2bbf2ada2f
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 external resources, suggesting a link farm or redirection strategy. One prominent URL, 'https://ttraff.ru/pify?keyword=pokemon+light+platinum+apk+download', is flagged as a malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also 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.ru/pify?keyword=pokemon+light+platinum+apk+download
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/0360ded1be14.pdf
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5f9833592a501.pdf
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f98cfb023906.pdf
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f95f600f3ba1.pdf
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f8e674163b8d.pdf
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/lafelixopipama.pdf
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/8a35044.pdf
    • https://cdn-cms.f-static.net/uploads/4410002/normal_5f971a17c8580.pdf
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/nakifoxozubu_wekuwa.pdf
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f938217702d7.pdf
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f92dd2021848.pdf
    • https://cdn-cms.f-static.net/uploads/4410988/normal_5f92fd88bda73.pdf
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/7795815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0502/5854/2760/files/bucket_sort_java_code.pdf
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/83865493351.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/unlock_protected_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0498/2066/3970/files/itube_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9553/1424/files/17701512409.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_off000063f5.bin
4436721698fa5a3e5bb4a176b261826369615e8a5a88ed9421d9c3c06d6f161c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5256 bytes
font_01_sfnt_off000075c7.bin
25ae6dc9ba3d7f680d0a99080bcb624887877cc8811acfe7780af27e6fba9503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 11416 bytes

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