Malicious PDF — malware analysis report

Static analysis result for SHA-256 73365e3607fa189e…

MALICIOUS

PDF

52.2 KB Created: 2020-08-26 07:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c9905b3d4627e8c0eb87a7918f1f41a SHA-1: e1115f5017ed7572f74c2fee2fec71a92e9d3bd9 SHA-256: 73365e3607fa189e51b435d29b98440eca607d5f1cbf9cfd62d99de1234f9b74
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 external PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=mekton+zeta+character+sheet, is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, potentially for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the 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.cc/pify?keyword=mekton+zeta+character+sheet
    • http://wulazap.drandrewlukaris.com/uploads/1/3/0/7/130739098/xuvogagug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0886/8001/files/kotimaxalonozulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2183/files/nims_100b_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/taruzelaseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/93082795850.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/90200028864.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/36070614669.pdf
    • https://cdn.shopify.com/s/files/1/0437/0687/6055/files/26868446583.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3721/files/89194832570.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/kivojivaniruditufugij.pdf
    • https://cdn.shopify.com/s/files/1/0439/3821/8152/files/68826745766.pdf
    • https://cdn.shopify.com/s/files/1/0433/4734/5573/files/dujelanakawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/36913913962.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006717.bin
9a63ee1e5584a596268a2841a90ea2dff596cf03aea0501b588d271ddce44d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 7872 bytes
font_01_sfnt_off000081a0.bin
29fb573d13795c717bea714e8e37a4aaadad9c052b0bec11803a0ea5c6141f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A0 4716 bytes
font_02_sfnt_off0000919d.bin
cdd65ed6fbf6342e326e11a7ee3862030289b0254e38de92777a30a29710177b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919D 10612 bytes
font_03_sfnt_off0000b580.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB580 4324 bytes

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