Malicious PDF — malware analysis report

Static analysis result for SHA-256 143c4314ce8115ad…

MALICIOUS

PDF

58.1 KB Created: 2020-08-12 23:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ed32dbf943e0dfc61ed9cda3a26c25a SHA-1: 4e6379ab8d11de668941efa3e3041c6b001d2e32 SHA-256: 143c4314ce8115adf138a062f6089bddd5b1cebc06a5bed2b47fccf7c85164f6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bourdieu+language+and+symbolic+power+pdf'. This URL is likely used to redirect users to a malicious site or download further payloads. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to artificially inflate search engine rankings or distribute malicious 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.cc/pify?keyword=bourdieu+language+and+symbolic+power+pdf
    • http://files.mrpodmers.com/uploads/1/3/2/6/132681460/sitokasirukepaw-vizojadozi-gejapefisuz.pdf
    • http://gupuv.budbarnyelm.com/uploads/1/3/1/4/131454065/d698b.pdf
    • http://files.avoiceforkids.com/uploads/1/3/1/4/131453065/zupixezumosal-tepelufamovi-figupudem-nabagi.pdf
    • http://najizis.sjssa.org/uploads/1/3/2/3/132303374/98b88f192.pdf
    • http://files.paulinepeelconsulting.com/uploads/1/3/1/3/131398244/ae32c3238b2bb8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/72899971905.pdf
    • https://cdn.shopify.com/s/files/1/0437/6572/7384/files/ruset.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1477/files/auxiliary_verbs_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/94019776903.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/85715925472.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/kunabilirurizezifobetigev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/fuwubunutelivol.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/62723641218.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/tuwusilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/pisitimixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/auditoria_administrativa_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/nosiwutupipidorifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/jiralogogej.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_off0000953a.bin
b4e9a636c95cda0d20940e33746db34193322d131dc7bc2603a5e4ff0b82fe84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x953A 5660 bytes
font_01_sfnt_off0000a872.bin
04176174f100b1fa7f89a2658738bb77093c36c3c4af29d03c752d107a11ed06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA872 10736 bytes
font_02_sfnt_off0000cc51.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC51 4324 bytes

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