Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b480b80638a071…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 00:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13d441ba93be9bcc188c6e485e05fab5 SHA-1: 0baa4c4de63d83df5148c3b3affb9b3732c59e25 SHA-256: 89b480b80638a071521dc8af2a02b4549486d7c24188cdd4cc4456bfdad7473c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bushfire+prone+area+report+vic'. The document body, though heavily obfuscated, appears to contain text related to a report, likely serving as a lure. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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=bushfire+prone+area+report+vic
    • http://files.ultraufitness.com/uploads/1/3/0/7/130738918/xeranusutub_jemag_vapomadapuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/50932150343.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/passive_tense_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/fuxapulafekab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/muduw.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/mibobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/xaxasejirab.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/potopadizag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/56129065556.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/concepto_de_analisis_financiero.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/78744779497.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/28485252096.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_off00005fe6.bin
e36dd14e42f5583cff81321a4240a26cc74a93ad9a249417ef73325bf5eeafaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5060 bytes
font_01_sfnt_off00007115.bin
32ae12fa5ee069ac5a9d0b60a0ba1cc252d1bd4b08c272bbd49185eed8edc05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 10620 bytes
font_02_sfnt_off00009551.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9551 4324 bytes

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