Malicious PDF — malware analysis report

Static analysis result for SHA-256 70182b2768ebf554…

MALICIOUS

PDF

39.5 KB Created: 2020-08-04 18:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a38f176341a8a63cba856cd48e2e77 SHA-1: 5dff55862de576e0147e07190bed5eff61e4a3d4 SHA-256: 70182b2768ebf554e19a986bb204b9583baf58172ad497b14de9ca2fb82b3e52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a "PDF_SEO_LINK_FARM" and another flagging a link to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=pdf+hematology+basic+principles+and+practice, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=pdf+hematology+basic+principles+and+practice
    • http://files.fermentasmania.com/uploads/1/3/1/4/131454207/1922b4b.pdf
    • http://files.glendalegatewaytrust.org/uploads/1/3/1/4/131437578/fujuno.pdf
    • http://files.robinhowardwrites.com/uploads/1/3/2/6/132681392/mikin_lovexulimuronas_xizunavi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/87865205014.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/54037384414.pdf
    • https://cdn.shopify.com/s/files/1/0440/0336/0926/files/zoho_aptitude_questions_with_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/xofopopawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/social_business_model_canvas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/81005441786.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/20957755958.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/19850144756.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/gun_script_roblox.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/certificate_of_appreciation_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/medogofumir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/dugamusabakoberemisevin.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059cc.bin
ee9d0ecbeb67041098c15ea346eeeeb7bbecd82c84e4f51b82bdead72f167dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CC 5812 bytes
font_01_sfnt_off00006d77.bin
d8c65ea2d4e2625b6cbe6a6b14f7728e44efbd58c19433f9ec51630b2fddad1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D77 10428 bytes

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