Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e19687755964169…

MALICIOUS

PDF

36.7 KB Created: 2020-08-29 05:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eb913d7bc116f5c6ef3ebf4ed0396d4 SHA-1: 04ff0d7b729a73d079cd776b975acb540406dcd1 SHA-256: 9e1968775596416911fd686d31e509da1b3dbd43c1a1d7307b775287ccd4b22d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=asterix+gaul+e-kitap'. Additionally, it exhibits a PDF link farm behavior, with numerous external PDF links, many hosted on static.usrfiles.com. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the primary purpose is to redirect the user to a malicious site.

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.cc/wix?keyword=asterix+gaul+e-kitap
    • https://static.usrfiles.com/ugd/b8c837_a90d8664a6a343a29c12e1403f3a203a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a687a3d8d2b548d5bc56bcab226a1abf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b6f4437a048e1b1b8aa2b02122d92.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/nokixepinokaremarisapu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/mutusaxidolam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/79455769838.pdf
    • https://cdn.shopify.com/s/files/1/0428/4026/0775/files/fitulosotipobosukesidogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/filmic_pro_6._6._1_apk_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/mizewurujuvurepiwo.pdf
    • https://static.usrfiles.com/ugd/b8c837_47bf84b640f6426cb4871c64fbd75f2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_34adfaa9bc7647e0a830fd03a0230aa4.pdf
    • https://static.usrfiles.com/ugd/b8c837_743a26bed5e847c9bbbd96eeb19aa4b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f649aabc47ad4a2eb5f785af23953cab.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0a7afd767240b0b5dfdea989c668f8.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_off000050d2.bin
b11ec217a34dcbb6030cebe93b572554a63256313dff6e855be2b204a9b98647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D2 5140 bytes
font_01_sfnt_off00006269.bin
0b9897535b78366f126baae1a065d5720419b58eabadc52a6ebdfb224ca9726f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 10696 bytes

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