Malicious PDF — malware analysis report

Static analysis result for SHA-256 755f1e00fb200524…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 02:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638b5e3aba0c5b4c18c4585288831d9c SHA-1: 0d10e38b72e379d0219dbe608c5e908d6a1eb64d SHA-256: 755f1e00fb20052432c5c5c63b251fdca762bff93489dbdf4be6383ec3b3152c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link directs to 'ttraff.com', a known malicious domain. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs, likely for SEO manipulation or to obscure the 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.com/wix?keyword=formato+condicional+ejemplos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1479/1069/files/nipaxipisoluduxuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/55322890814.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/61626327956.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/kukadobabavapugalib.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4603/files/merolasizugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/netosozesumixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/tisunutevavuguxakizapofil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/sifukofebegukugetapowerab.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6c540fb377f418ca626bf783993789f.pdf
    • https://static.usrfiles.com/ugd/07ef24_c5c9f0877ead42b1883169d773e84af9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c725f526024438b7f4cf0be92ce86c.pdf
    • https://static.usrfiles.com/ugd/b8c837_205fb915f4b944ec9970dbbaa2acd521.pdf
    • https://static.usrfiles.com/ugd/67f5f7_03046f1fe58d4ffcb1a314cbe121382c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d824dd26c0dd4b38ba26063f9bb9d10e.pdf
    • https://static.usrfiles.com/ugd/38bf1f_8d9bcb189bbb4476bb7103aa59418cea.pdf
    • https://static.usrfiles.com/ugd/b8c837_66a6cfa2ee224b98bf7f8cd17310c0b4.pdf
    • https://static.usrfiles.com/ugd/ea78e0_dd74aee7bde744e4853c9cb80ce113b5.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_off0000603b.bin
76ebc994c738edd14220a5b26da80de36f70f039655d15558dcce846d1805e99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 5248 bytes
font_01_sfnt_off000071f8.bin
9425202ef930d44b0ace50015302ec4b6bcc27ce955ec010246a7fcfaaa6ae68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 11176 bytes

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