Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d7e759cccd1da1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-27 13:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2c265c079299c747e9d55d75b84223 SHA-1: 3ced1d84fe73625c6853051b9be3110f2f2b724f SHA-256: 94d7e759cccd1da114de56421c5ee9a40866a1b79b5796893702691cd13fbd37
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The presence of a 'download button' heuristic further suggests a lure to trick the user into clicking the malicious link. The document body itself is heavily obfuscated and contains the malicious URL, indicating it's part of the delivery mechanism.

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=de+escritura+manual+tratamento
    • http://files.joshua-swain.com/uploads/1/3/1/4/131483214/443d7d.pdf
    • http://zekive.hutaka.com/uploads/1/3/0/7/130775987/zisuwunew.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/16260341139.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/oxford_dictionary_for_java_phone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/53552296452.pdf
    • https://cdn.shopify.com/s/files/1/0458/0956/5862/files/sumegikazezevuw.pdf
    • https://cdn.shopify.com/s/files/1/0466/3079/7477/files/82618009587.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/87052171036.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/numuzerejoluzatunekor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/75524098239.pdf
    • https://cdn.shopify.com/s/files/1/0438/3955/3696/files/temowibina.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_off00005ec2.bin
59bba48bda901e75e8bcd76ed445c293c9da62a8249198efdb19d7c5ca9edc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC2 4944 bytes
font_01_sfnt_off00006f7a.bin
c526a4d6990aa8dd799f26c9fbc4f41a4790f7fef951298a14e2c38a9dd84a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 11588 bytes

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