Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ccda887a118d22…

MALICIOUS

PDF

52.5 KB Created: 2020-08-27 14:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19127facde9a354269ac375b9957bed2 SHA-1: 7dc0a97f9af57074fd75b52b1a4776a01ea1454d SHA-256: c7ccda887a118d22469095dbf8a328ea4e9eb988c172849dcb1fdfa8f516111c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=fazer++filme+caravana+da+coragem'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further indicates an attempt to distribute malicious content. No scripts were extracted from this sample, but the embedded URLs and heuristics strongly suggest a phishing or redirection attack.

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.club/pify?keyword=fazer++filme+caravana+da+coragem
    • http://files.readingworksmedia.com/uploads/1/3/1/3/131398374/6477306.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/wuvugonegijoxaxotomukepap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/wunojopagekuwevametu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/word_to_adding_blank_page.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/69987107819.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/pujavirepeje.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/64798816131.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/57434721785.pdf
    • https://cdn.shopify.com/s/files/1/0439/8150/4670/files/19100812891.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/87603998257.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/dejukupudibirevujivutado.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0465/0142/9406/files/1367389477.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8315/files/accounts_receivable_process_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fbf.bin
043a331dd5745a809667b7de6c50cf9404e9bcd12ad091d63b4c2701e82f987a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 5228 bytes
font_01_sfnt_off0000917b.bin
b04fd061d88161e642dd5dd231ed0985da87bbf7e5c5b12db183b98a00afc53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 2180 bytes
font_02_sfnt_off00009b94.bin
67f52245cfa3693ece0f89fabc76645580ac4b7ddf0d3c6f6a93086769d9b9c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B94 13008 bytes

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