Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c8e4d9ab878e36…

MALICIOUS

PDF

46.0 KB Created: 2020-08-10 21:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076c66761266c71ec3508049d8175c3c SHA-1: 4f52313409a38353dc8e7a39b168c09ab71fcd41 SHA-256: c5c8e4d9ab878e367dbfdc51bd632322a5725820fa12584f03d8b37d6341be08
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=stored+procedure+in+sql+server+with+example+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. 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.cc/pify?keyword=stored+procedure+in+sql+server+with+example+pdf
    • http://jumukop.australian-spirit.com/uploads/1/3/1/6/131606289/3303195.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.southsurreygardenclub.ca/uploads/1/3/1/3/131398019/tefowipuxuj.pdf
    • http://lukuret.shophealthygoddess.co/uploads/1/3/1/3/131379552/25565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/rebel_yell_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/attestation_d_accueil_cerfa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/61691748677.pdf
    • https://cdn.shopify.com/s/files/1/0431/5748/7778/files/51122710334.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/vikenalapirisunel.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/pivobor.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/64307243323.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/41681184686.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/24671938685.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/pelef.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_off000063e9.bin
f393439c69cfe4a9b2fa0c89fb566b8522844884dd9b84989320fb2bb19598f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 5844 bytes
font_01_sfnt_off000077ae.bin
94d7ad135b6f335bde4e9188c80c1bfeb14fb0e1a6f3cf1ed2576e82082f2751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 15916 bytes

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