Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba88a63d5ec1db3…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 20:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93cfa66b71fd26af65e0b655a75a2f86 SHA-1: b21deeefee8707ef40efb3febcc43de3dac32044 SHA-256: 6ba88a63d5ec1db3778f7aa37d1f2b460d4047241e974832970ac9339ec7144a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=alcatel+one+touch+1035d+specs'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, suggesting a deceptive lure.

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.cc/wix?keyword=alcatel+one+touch+1035d+specs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/tv_guide_tonight_bbc2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/saloxexusudoli.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/wivagi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/awesome_ukraine.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/javasir.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/blank_white_paper.pdf
    • https://cdn.shopify.com/s/files/1/0440/5637/9557/files/gif_de_electricidad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/behringer_mixer_1002_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9121/2950/files/77651545915.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/risk_management_and_insurance_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/cambria_bold_font.pdf
    • https://static.usrfiles.com/ugd/3e9e83_d08a844024c9486d98e5cdab2df97b16.pdf
    • https://static.usrfiles.com/ugd/8a419d_8d11a9d2725e440187f227a6bf6dc815.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11e002cb2c94ac19d58f412c992f902.pdf
    • https://static.usrfiles.com/ugd/b8c837_7158018ce86b44ffa626a76abc9a9b06.pdf
    • https://static.usrfiles.com/ugd/b8c837_da67616249a94069aded818778114e0a.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005779.bin
421ff126c5e18986e69cdcd01a387d6a0be0e43f876241347f7fff15adef1c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5779 5536 bytes
font_01_sfnt_off00006a47.bin
219d5762274672f1a9eb8df68b203a6249d4da77b24e7aa15d665edbc50f5481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 10476 bytes
font_02_sfnt_off00008e5a.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5A 16060 bytes

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