Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2edb84b929d7e0…

MALICIOUS

PDF

75.0 KB Created: 2020-11-01 10:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 820e70180b0fc377ee7944903ae29c40 SHA-1: 1ee5379e8f8879c2baed40751347336254a993bd SHA-256: 8c2edb84b929d7e063398497f6aaf7190fd37f43f57c1abc1bf8a5185c927b45
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to 'gettraff.ru'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to trick users into visiting a malicious site under the guise of providing information. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

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://gettraff.ru/123?keyword=wraml+2+scores+qualitative+descriptors In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f9e4fc8e23d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5f9bb5fc7b9cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f9b3d3a6f84d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6972/7415/files/switching_power_supply_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6375/3927/files/jovovolifeguvemopoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4265/0277/files/39230925089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9466/5125/files/xotox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2632/0040/files/60484523114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7208/1051/files/incorrect_word_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/zurifupap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3969/2214/files/28304542489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5144/1045/files/40437098130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5468/5077/files/jupigufiridepog.pdfIn PDF document text
    • https://doi.org/10.1007/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 5548 bytes
SHA-256: b7d837d4fd27b800a7058c718a638e1763228804b635020f3f65321edf47846e
font_01_sfnt_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 12512 bytes
SHA-256: fc95124296da41ca2208fca1dd9b6600888155c687b59eb896a177399ff1de4e

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