Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6596c0e904184d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 10:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507de880fdd5620afa2bf25f54e19493 SHA-1: 259356f7b19d3290cb9b0e639d29317dbd61da14 SHA-256: 9e6596c0e904184d5bc13653683729e3727a53ef7ef06bd2480cfff97103d390
128 Risk Score

Malware Insights

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

The PDF file contains a lure for 'Avast free full version' and a call-to-action button, aiming to trick users into clicking a link. The primary link redirects to `https://ttraff.com/pify?keyword=avast++free+full+version`, which is flagged as a malicious redirector. The document also hosts a large number of external PDF links, many pointing to `cdn.shopify.com`, suggesting a link farm for SEO poisoning or traffic redirection. 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.com/pify?keyword=avast++free+full+version
    • http://sapifidoj.bubakes.co.uk/uploads/1/3/1/6/131637881/gurukejuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/69819132017.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/free_registry_repair.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/kupizarapaluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/vilena.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/66044186131.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/68012473800.pdf
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/banking_and_financial_awareness_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/begenusuromitaxakebaz.pdf
    • https://cdn.shopify.com/s/files/1/0447/8697/4869/files/canterbury_tales_nun_s_priest_s_tale.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/47023804347.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_off00005bfe.bin
b5d1e952975ec827b22a4f2fdcc903ddbce370dc47736b40d40504b3b2715642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFE 4812 bytes
font_01_sfnt_off00006c6b.bin
e7ef2eda02ad22aa428cb717b648547362a2019a81b5f27a04fe8c7acc27b913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6B 10108 bytes

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