Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8af8eafc9508877…

MALICIOUS

PDF

33.4 KB Created: 2020-08-14 02:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 215624e534283cb09e5eb35b8b063475 SHA-1: dcaa193441bda3b137eb8f1285a157e14edeb692 SHA-256: e8af8eafc9508877490c4fd332b1b77c97fc1f50abe40cbeaec4c9cb0a873e24
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains the text 'Happy birthday mohammed cake' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a malicious redirector.

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.cc/pify?keyword=happy+birthday+mohammed+cake
    • http://fusol.endodiabetes.com/uploads/1/3/2/8/132814742/gejedalukesi-togopogasejesoj.pdf
    • http://tutix.allimagesonline.com/uploads/1/3/2/7/132712324/bonogetizobezen.pdf
    • http://files.mantecaeducators.org/uploads/1/3/0/7/130775949/1433021.pdf
    • http://files.coasttocoasthauoratrust.com/uploads/1/3/2/7/132740620/suzozujiduweluxajaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/pipimijovubunawoso.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/21467747059.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/pogixefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/plural_nouns_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/0351/6827/files/69877681376.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/77242297162.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/medopavazesaron.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/fakedawiniririj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/wesoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1775/5034/files/algorithme_de_tri_par_insertion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/52202531621.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4565/files/patuzorijatixu.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_off00004667.bin
4640c315228d954d960583779cb7c430d01c13e38a59c46a1a94c2948c5dae11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4667 5372 bytes
font_01_sfnt_off0000587c.bin
3e02df7eb56966d5582ee2a04a56a2f09a4ee4b8b968070fee869601b4d683f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x587C 9516 bytes

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