Malicious PDF — malware analysis report

Static analysis result for SHA-256 49873708dea5b964…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 20:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db69378677b018b73db31562f7881fb SHA-1: 546127c7f86b1f795e2a6360a287cd7290c20d23 SHA-256: 49873708dea5b964a782adab606d118f2d7caa8ad71462dc264586399e838886
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Ielts reading test pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a visual download button heuristic further supports the social engineering aspect of this attack. The primary malicious IOC is the ttraff.com redirector.

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=ielts+reading+test+pdf
    • http://files.shelbygulllaird.com/uploads/1/3/0/7/130739069/2014603.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/wirakedus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/62220609452.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2305/files/tigavejibet.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/difference_between_alpha_beta_and_gamma_rays.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/53140024792.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/jegirefixadusosekinawoze.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/wikujofitowi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/29338501362.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/maporugukobefuxusofux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/87648038260.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_off00005b88.bin
2932024040f9a0d4cb5b5f8b85ad913df9998db0784b778d61291abc8a9cb0a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B88 5148 bytes
font_01_sfnt_off00006d10.bin
edb18cff931cfdb5a762e28c012ccb4fe5ecabf667b15a8bc43fa776e95a8cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D10 9896 bytes

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