Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e97085b0396991…

MALICIOUS

PDF

38.2 KB Created: 2020-08-27 18:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06c6caebe595efb4e810e47fa3ac794 SHA-1: 1592fb6692411c9ab55dc9137af92b8387606189 SHA-256: 47e97085b039699124bc9309dbb148c9dd76358e78cc373deb5c4d744a30e5f1
130 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector URL, indicating an attempt to lure users to malicious content. The presence of a 'download button' heuristic further supports this. The document body, though heavily obfuscated, contains the malicious URL and references to 'bookworm free crack', suggesting a lure for pirated software. The primary malicious IOC is the redirector URL.

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=bookworm+free++crack
    • http://kuzimekoz.casacose.com/uploads/1/3/1/4/131407469/vubuvudixozisan.pdf
    • http://jasufino.rfid-off.com/uploads/1/3/0/8/130813604/xoligixivugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/fipufagorijotifopatebovar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/mapefawolokisazoketi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/college_algebra_ron_larson.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/cavy_animal_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/android_navigation_bar_color_react_native.pdf
    • https://cdn.shopify.com/s/files/1/0463/2576/0155/files/56290788826.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/75300519193.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/52849717016.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/orchestra_instruments_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/85350659498.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_off000056f0.bin
085ff6cb63bc348e0ce363e65b053910b427bc6e86c3853a6432955aa5859ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F0 5020 bytes
font_01_sfnt_off00006802.bin
d3a7dbb0b322b1bb6696bb6e923347bc089c0ae89b548aee1c6d4062bf01c8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6802 10712 bytes

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