Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd50734fc354a24…

MALICIOUS

PDF

46.0 KB Created: 2020-07-27 23:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a8bd335aa533ec9d731ba80a44f13b SHA-1: a0402b5294d211cb89aae6315a903199794dbd9c SHA-256: bfd50734fc354a249f5a386483d702b823884557798364b02941d2974db350bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=aktu+date+sheet+mba+2019'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0434/7851/5864/files/jowuretamoxofotegebelu.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the redirector URL is the primary indicator of malicious intent.

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=aktu+date+sheet+mba+2019
    • http://files.kylespestsolution.com/uploads/1/3/1/6/131607544/8031910.pdf
    • http://files.reneeheissart.com/uploads/1/3/1/3/131398224/1164212.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://files.slowfiber.com/uploads/1/3/2/6/132695531/9240f93f28d.pdf
    • http://files.northposeybasketball.com/uploads/1/3/2/8/132814826/malavedozobefuv-xufopoxazetaw-nikozeta.pdf
    • http://files.slowfiber.com/up
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/jowuretamoxofotegebelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/96949851081.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/nopopida.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/14090806649.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/feriwawox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/kavetuniforeref.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/vapira.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/jisaniruwumodesopijonezaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/zapamugagikizenezunatod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/wewunorilibisagutizosul.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/94054440390.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/8969435878.pdf
    • https://cdn.shopify.com/s/files/1/0440/1889/2958/files/20846222136.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/rogabosofel.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007697.bin
3ec7d8c31b5281a42a794cc6e0621f8faf154ecefe60460ea87bcaeeaba8ced3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 5228 bytes
font_01_sfnt_off00008858.bin
c603e5b5c74804e697628d9c81c30e3272ec8b9299e8507d2c2279f817cd9404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 10316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.