Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf83ced4dd59082…

MALICIOUS

PDF

54.9 KB Created: 2020-08-23 07:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd07f2bcc45613d0f446f98cb75e6c03 SHA-1: 32e94c9751f2759d72a6a6f676c5c80d0f248c3a SHA-256: dcf83ced4dd59082fe02c51f7acb3426c81f5612d0876301df36c9c503db792d
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The presence of a 'download button' heuristic further supports a lure-based attack. The document body contains a URL that aligns with the malicious redirector finding.

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.ru/pify?keyword=chittagong+movie++worldfree4u
    • http://nupovi.allendaleunionchapel.com/uploads/1/3/1/3/131384306/lazodenop-betuxivesemosax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/zaxigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/jidezavotuzarevat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/worldview_3_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/oxford_maths_book_for_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/34313976017.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/bdim_guitar_chord.pdf
    • https://cdn.shopify.com/s/files/1/0443/8091/3830/files/mt_snow_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/95791019482.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/65039108619.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/67005091924.pdf
    • https://cdn.shopify.com/s/files/1/0435/4588/6884/files/fisajadopadujorujaseju.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_off00008bcb.bin
1741c53c179b91275b619047477daa9b39ecc15306cb769be095bb6c0c9675ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCB 5288 bytes
font_01_sfnt_off00009db4.bin
850199c4272219667ee1d2ad4fe9ba8d7a2c7140fff1ead1b618a2fffb8dc9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB4 15268 bytes

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