Malicious PDF — malware analysis report

Static analysis result for SHA-256 5456cd08b62affe5…

MALICIOUS

PDF

63.8 KB Created: 2020-08-21 23:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ff939999fe16d95849a815abc71b479 SHA-1: e85b38bdd50a12a51f41745bd7fc662cda4d66ea SHA-256: 5456cd08b62affe55ae2d47a7c65e3db247434aca75ac1b194564ad5ba077937
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains the target URL and keywords suggesting a lure for software. The presence of numerous embedded links to external PDFs, many hosted on Shopify, further supports the SEO manipulation aspect. No scripts were extracted, but the primary malicious action is the redirection to a harmful URL.

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=3d+pdf+converter+for+autodesk+navisworks
    • http://sazas.nahyc.com/uploads/1/3/0/9/130969723/3790089.pdf
    • http://files.ocmunc.com/uploads/1/3/0/9/130969974/4849623.pdf
    • http://files.theshak.com.au/uploads/1/3/1/4/131455903/pesul.pdf
    • http://ritovipi.toriseabovepoverty.com/uploads/1/3/1/3/131380480/sozoz.pdf
    • http://files.eatonsbnh.com.au/uploads/1/3/0/7/130775107/d5649e3d868a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/72718665555.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/wuvidokimojakapab.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/89359593787.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/72409202688.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/wajarugazozolob.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/pivise.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/28085437263.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/vegetobegijepe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1790/9910/files/san_diego_craiglist.pdf
    • https://cdn.shopify.com/s/files/1/0463/0570/6146/files/addition_and_subtraction_worksheets_with_regrouping.pdf
    • https://cdn.shopify.com/s/files/1/0448/4559/6834/files/68561962508.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/nhie_home_inspection_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1920/5789/files/steam_friend_search.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/account_management_resume_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a56f.bin
7757c8d205eae4883ff5fb88a9e66c8d72d415e4cc98a2a25fc83b10f2009ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 5284 bytes
font_01_sfnt_off0000b77d.bin
b575979a642eeac2d126d205e65762ffbf619266352d47354b6338fa629bc32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB77D 13904 bytes
font_02_sfnt_off0000e387.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 4324 bytes

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