Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9791824822b86e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 02:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01523c20c8f2f96809e2276d4264590b SHA-1: dcf76fbe61eeba289e029836c57df9da8c630615 SHA-256: 1b9791824822b86e41a6b3b4c8ac29ea787324d7e7948cc996e6f444fa703f5f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a link farm hosted on cdn.shopify.com, designed to appear as legitimate PDF documents. One prominent link, https://ttraff.ru/wix?keyword=dota+2+mason, is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution, using a lure related to Dota 2. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=dota+2+mason
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/vuxegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/dejozoveg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/24947754518.pdf
    • https://static.usrfiles.com/ugd/b8c837_d946a00d414141e79af84fb08e1ae5de.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b44f289cf9405e9b6eb01e7ceb64d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ae27870620c465c913b4e03392c914f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/73720244374.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/rasojewasesoxubazinepitom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/xijesapaxisopuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/79671976372.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/42290882113.pdf
    • https://static.usrfiles.com/ugd/b8c837_53d15e11b23a4e0795e6ea36f5975481.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e97ca742095433ca6b4e60f8d16cf3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_deb5c7387a674cc1b867487c87350d85.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b7d39b72a64b3a9ebd791606d268f6.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_off00005d4f.bin
f84cac8b97bc22bac6791b1ad1f49d5913dff2550a9b50278871e636d3e7398f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F 4836 bytes
font_01_sfnt_off00006daf.bin
dcb8be55e0c384be79f2d065af9c7dfcb0cc986b8339da22dc520745312537ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 10572 bytes

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