Malicious PDF — malware analysis report

Static analysis result for SHA-256 34554cc8ee1a284f…

MALICIOUS

PDF

48.5 KB Created: 2020-08-13 22:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48fdc781fccfcab1fa6285a197c1a067 SHA-1: 0eb490a81919fe48e9db666d91573fbfedfd66e1 SHA-256: 34554cc8ee1a284f46c0d424b9e05f708604553d03af9b609df6dd9d257415d8
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 a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the document is designed to lead users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=chahu+pas+pas+aana+song
    • http://tavor.mccaconvention.com/uploads/1/3/2/6/132696128/645549.pdf
    • http://files.crystincomputerscience.com/uploads/1/3/1/4/131437636/9002929.pdf
    • http://rokad.ntqgchicago.net/uploads/1/3/0/8/130813095/nemawajodotakituru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/dutagapene.pdf
    • https://cdn.shopify.com/s/files/1/0448/9006/3003/files/pdf417_barcode_font_ttf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/kitoxukosigoxopavopino.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/oxford_dictionary_word_of_the_year_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/87351758594.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/16298193065.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/99_names_of_allah_poster.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/field_study_5_learning_assessment_strategies_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/corpse_bride_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/bigonodigutigid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/7440727323.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/63257651994.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/88604793173.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac5.bin
8a82a9b192fe7ce6ce90392932dbc681bfeba73610b5de4b035269e0f9602904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC5 4612 bytes
font_01_sfnt_off00007a5a.bin
10e1fd1326c1ff59e04933cea9cbd1012a931732301cfc9d5af7fa0ebd56a1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 14800 bytes
font_02_sfnt_off0000a749.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA749 4324 bytes

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