Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e2e2d8ed9c24be…

MALICIOUS

PDF

94.2 KB Created: 2020-08-07 22:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 406da42fe280c650ac6a0a9bc17894df SHA-1: f57afac94101ba66fbf359b0170bde42371de52f SHA-256: a4e2e2d8ed9c24be02983993a556dccdcebf7207a99e4c8e4449379ae0d2610c
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a book title and the URL that triggered the malicious redirector. This suggests a lure to a malicious site, potentially for phishing or malware distribution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=epidemiologia+clinica+fletcher+5ta+edicion+pdf
    • http://files.soluschristuschurch.org/uploads/1/3/0/7/130775784/gulivufup_xibiz.pdf
    • http://files.juliathepotter.com/uploads/1/3/1/4/131453348/zajof_kituzatukuzaku_tubumax_nuvajisak.pdf
    • http://files.mindfullifefocuscommunity.com/uploads/1/3/0/9/130969709/koxamenukorote.pdf
    • http://files.rebelsinstereo.com/uploads/1/3/1/4/131407705/jexelogofux-xojibit-wajegowodexidix.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/9030364784.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/14401783605.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/2x4_furniture_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2007/files/difference_between_intranet_extranet_and_internet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/jutidefuwabulubimopif.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/volilizebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/kojazavusozas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/peskin_and_schroeder_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/mergers_and_acquisitions_calculations.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/todidemujobebiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/88282145903.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_off00012a20.bin
86f30dcb25998af865809b1b7680318e0b9ffbaf5cf7aa3671e48378720203e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 5472 bytes
font_01_sfnt_off00013c9e.bin
7ff70fb882118a1862b86e4605fb1199b27fe371dc0d2d6da2541f773530cda4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9E 14524 bytes