Malicious PDF — malware analysis report

Static analysis result for SHA-256 54139566ca120ec2…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 17:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 629d17d166acbbd452490b109b31ba75 SHA-1: 341b723d6261f78a7520000bbef7c93612d8541c SHA-256: 54139566ca120ec23d07c9cbc9acea0151a5e22907ba46e933f28badd7b4c7e1
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=printable+alphabet+worksheets+free'. Additionally, it exhibits a PDF link farm pattern, with numerous external links, many hosted on Shopify. The presence of a visual download button lure further supports the malicious intent. No scripts were extracted from this sample.

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=printable+alphabet+worksheets+free
    • http://files.rbpayne.com/uploads/1/3/0/7/130775652/14ad96c5650.pdf
    • http://files.womenofthemorningstar.com/uploads/1/3/0/7/130738794/goniviri-venumeno-dafikaxukavima-wedipaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/19032719154.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/libulewipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/18292575481.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/39837693850.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/84503956914.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/74965136418.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/fojenukawutazal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/10237516630.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/borulanimidozudig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/resizanabotufigoxidofaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0955/files/43234597760.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_off00005b15.bin
b2948b279dc15c3c68fa87a2c610e66b8da14d865f6cc50362240ec7d946956c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 5288 bytes
font_01_sfnt_off00006d12.bin
e46ff63a13ab017b7a7817ba9a2082b0053a0bff8c59ed0a0d82189495eb78df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 11604 bytes

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