Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ee2c4368e49c6e…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 12:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffae130a61b178e392725b89deffae56 SHA-1: d69a11588077f2ef89a5b9121f9084f126a5c6ca SHA-256: c8ee2c4368e49c6e105c10ff2cc96de2ee4d4b8d8f4c98a6c789968369739507
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=basic+computer+questions+pdf+free+download. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution, under the guise of providing a free PDF download.

Heuristics 3

  • 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.
  • 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=basic+computer+questions+pdf+free+download
    • http://files.pwbc.us/uploads/1/3/0/7/130776394/waned_sikopegevavud.pdf
    • http://files.furdinez.com/uploads/1/3/1/4/131453401/mopipemuf.pdf
    • http://files.kinderdanceaustin.com/uploads/1/3/2/6/132695747/gamosuniwava.pdf
    • http://files.yusofgajahlingard.com/uploads/1/3/0/7/130740078/7510150.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/47473889400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/budixejuvopanatugenijalub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/nadaregudosetulugomedore.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/90403008201.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/nunoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/muzarixoxivuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/python_subprocess_stdin.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/24936386683.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/dudidukoliwudofidasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/80292208237.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_off00008a76.bin
34dc54c4097fa91b58cc4b61a623390c9cdb7de3b6059a295e0de4166cfc83f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A76 5568 bytes
font_01_sfnt_off00009d4f.bin
c4d76baa211706bf303d927932f23617e65c9aa82ebaa04721dc7e1ea98e8c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4F 10604 bytes

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