Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4e143c7f7d5ce4…

MALICIOUS

PDF

47.8 KB Created: 2020-08-24 00:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd5e24391cbc728920daf473709c4f56 SHA-1: f5cdbd236fc18c1f6108917466bbbd9b70f088bd SHA-256: ed4e143c7f7d5ce48aa2bd3c1656ee617ff7699e5e5b561fb920306f19c3404a
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of a 'download button' heuristic further supports a social engineering lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=atheros+ar5bxb63+driver+xp
    • http://vujuvasop.hannahjudson.com/uploads/1/3/0/7/130739204/xipuz-begesikavojiz-bowuzivo-wofilut.pdf
    • http://toxorut.drnajera.com/uploads/1/3/0/7/130738720/fupigilobigew-vekukokijuvu-gurigotofaxe-fewumowe.pdf
    • http://files.flyingcoloursnursery.co.uk/uploads/1/3/2/7/132740836/f488c01.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/catecismo_de_la_iglesia_catolica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/jofif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/brandon_sanderson_starsight.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/lasuwipekizulezulipaziviv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/82673940591.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/15830609548.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/levenoxixuforojaxewujaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/1782079638.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/29198438342.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/97106082571.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/64903342268.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/files/1/0427/9864/5404/files/8267394059

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007464.bin
833a84b7cb994b26823eee4489d891c6dfe7c194a56780a52dff701e09f001b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7464 5716 bytes
font_01_sfnt_off000087d2.bin
21f109066b2333e5ad3dacbec370105b2da28b9b2a70d9c36bce23bf9b20bd5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D2 13416 bytes