Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bafe4321214adf4…

MALICIOUS

PDF

47.7 KB Created: 2020-08-16 15:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96836dfcc7be3212ab59157f9d8a2c60 SHA-1: 433f3c05ba65c90ea0f130541f7779b0c7a46e63 SHA-256: 9bafe4321214adf47a04cf830848bcc729ca819f1780a1487e22500543a20882
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection attempt. The heuristic 'SE_DOWNLOAD_BUTTON' indicates a lure to click a link, which is confirmed by the presence of the malicious URL. The document body, though heavily obfuscated, contains the malicious URL and a benign-looking URL, likely part of the 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.cc/pify?keyword=guided+group+tours+of+italy
    • http://files.korea-chile.com/uploads/1/3/1/3/131398358/kuduju-tixojer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57308776079.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/wimekatowibazodenavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0430/2887/3367/files/pizukulikuzewirekati.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/biwenajara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/guideline_value_for_survey_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/origami_boat_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/91549559257.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/natefi.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_off00007dd8.bin
e940874a29e3ed37c9cc665a74e00328918642b452854d3438aad376fa2a8c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 5340 bytes
font_01_sfnt_off0000901e.bin
8a2312a6d7291ad868945c7991f64048f3e402d5fef00cb8f370f0d9c0a7c38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901E 9952 bytes

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