Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d7c878df20b2f8…

MALICIOUS

PDF

34.4 KB Created: 2020-08-31 12:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7179f9df3b8079480fa3b495a20c821 SHA-1: 2f20ff56d5238a206baaf56445c78c66d3763931 SHA-256: 40d7c878df20b2f841dd684e6bd6f9ba47e74d221f3a097d48a7cf5c51b25ffe
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely as a lure. One critical heuristic indicates a PDF redirector link to 'ttraff.com', which is known malicious infrastructure. The document body contains text related to 'Hp stream preisen' and includes the malicious URL, suggesting a phishing or scam attempt.

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.com/wix?keyword=hp+stream+preisen
    • https://cdn.shopify.com/s/files/1/0434/3667/1132/files/oxford_bookworms_stage_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/kukasij.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8876/files/sumosekuwutodegebumabifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/wuwifodagopoxoborivoxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/1210844451.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/47429409554.pdf
    • https://static.usrfiles.com/ugd/77eba6_e1583385abb345339f057d035d2ba148.pdf
    • https://static.usrfiles.com/ugd/5be868_13af0fcb0f084200a3ef4408f2fcedb0.pdf
    • https://static.usrfiles.com/ugd/0aab01_246c9a563aa54b679f187f8c19b99edd.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/skyrim_undeath_immersive_lichdom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/3072484210.pdf
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/rewodav.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_off000049de.bin
8e67e0c2a15370c1bd7cbdbc38e8eadee365f39d86b17335d5500af8541744df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DE 4892 bytes
font_01_sfnt_off00005a68.bin
177e5b74f6fef559933f7c6490bf426598930eea6a21d0e6c2da818b37522a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A68 10108 bytes

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