Malicious PDF — malware analysis report

Static analysis result for SHA-256 680b09f869eba3cb…

MALICIOUS

PDF

617.3 KB Created: 2020-08-18 22:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05bb265ef5795546ee4356313e5dd3c6 SHA-1: dd736f7eae10009ad9cd4fb8b1ac694ea5385200 SHA-256: 680b09f869eba3cbfab56be089b795c47208fcfc48ee01a7e3c0dc211b5b9d5a
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector infrastructure. The embedded URL, https://ttraff.ru/pify?keyword=incinerator+specification+sheet, is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9643

Heuristics 3

  • 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.
  • 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=incinerator+specification+sheet
    • http://files.beginningpointchurch.com/uploads/1/3/0/7/130775853/5348060.pdf
    • http://files.jtpelectrical.co.uk/uploads/1/3/0/7/130775249/3965359.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/61313004609.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/87229411322.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/96230505528.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/57880396628.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/vuwizasonopemafiverovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/oraciones_arcangeles.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/giguwafitibed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/3547083377.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/71286249939.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/geziwerotutupasid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/93931739453.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/wumovusobotu.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_off00094e31.bin
b2fd7487b49caf472faaa28986e304bef372d922ab3acca1fa433c6539063548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E31 5008 bytes
font_01_sfnt_off00095f33.bin
ecfbe14e293274cbbef9e5e6a0eee83309c1ce0f674bba3492e3db26be68c75a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F33 16852 bytes

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