Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f05733870e0aef…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 08:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddacb6dde41f054722a1f5cfd086c270 SHA-1: e1fddc32cad7ca67ad35273ad461586e8f9b7818 SHA-256: 72f05733870e0aef5ed826e2f0566cda4a3b985439ad19802dd4ba4ccb5f711a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but the primary link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wb?keyword=neurodinamia%20para%20nervio%20ciatico%20pdf, which is flagged as malicious. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

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/wb?keyword=neurodinamia%20para%20nervio%20ciatico%20pdf
    • http://files.childrensmarketatthemill.com/uploads/1/3/1/3/131382808/sufevibunawo-vebakerefawewuz.pdf
    • http://files.guyingram.com/uploads/1/3/2/6/132681596/3295852.pdf
    • http://files.patrickduddy.com/uploads/1/3/2/6/132682970/kukiz.pdf
    • http://bisewazu.southamboyparade.com/uploads/1/3/2/7/132741555/1296389.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0431/3615/5809/files/drug_resistant_malaria.pdf
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/88296025496.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/5039447054.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5215/files/18903760678.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/kaduzikokovo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/toxipu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/86376045090.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/90622489163.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/7806151601.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/sifofire.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/pugisolovumiwitinokigowid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/zuxatavuwawidivewimunipad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/bcg_matrix_notes.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_off00006ad0.bin
f45fd9ce132a8fd6777b207cca7f825ba1b3b675e5c939856168b98275daa8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 5120 bytes
font_01_sfnt_off00007c33.bin
d7e1a9aee591aad0f0fcfec02ef66b044c054213c97b3e60f2e6c42780b518d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C33 11576 bytes

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