Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac6dd59654528bc…

MALICIOUS

PDF

43.2 KB Created: 2020-07-31 17:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb90baf6bd464daf2cd744b5eb776e90 SHA-1: f90011e064d974d49e7235b9166cbd4f1ee18f43 SHA-256: 4ac6dd59654528bcdfe98fc3bdc50dfc272308255baee05190daa8b52316f21e
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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.com/pify?keyword=weber%2527+s+big+book+of+grilling+pdf
    • http://files.cefindiana.com/uploads/1/3/0/8/130874075/4da95ec61a3.pdf
    • http://files.traceyquezadaproductions.com/uploads/1/3/2/7/132710797/cf0e875314d.pdf
    • http://files.martialartskirkland.org/uploads/1/3/0/7/130776264/nuvagegizuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0796/files/94233181711.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/gesixuzag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/wapuwofalezomereb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/tuluvim.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/19011850963.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/pixagojujotufovowoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/79357542053.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/puzovimiwasogokulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/sumobakekumuvipodosebosuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/pasufavasimewabuxod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/29004822330.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/17292713304.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a38.bin
ba9360c3128e3c979e13fafc9cb5dd74aef4c0a80fed9fa21214207c85dc30b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 5252 bytes
font_01_sfnt_off00007c3a.bin
a86fabfad7ca5ca3a887c782318cef3911a24128efb59b157266a7b909bf5171
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3A 10448 bytes