Malicious PDF — malware analysis report

Static analysis result for SHA-256 17acab30c8360fa6…

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 01:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e0f57adccf3f74fcd49b59612f1c88 SHA-1: 25de2e735010590a9342785f82ada794768fd310 SHA-256: 17acab30c8360fa6a007dd92f915d8158e40389daa206040046793cc6d0cdbbd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/wix?keyword=swot+analysis+word+template+free', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=swot+analysis+word+template+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/61b8bf_a2f7ec6a3a5f4c68bb41b330f4c9e507.pdf
    • https://static.usrfiles.com/ugd/de60da_16fe5b1c7dc94b4ab145a7288641137a.pdf
    • https://static.usrfiles.com/ugd/60933b_42915d7645f043c0929abd8e42d36520.pdf
    • https://static.usrfiles.com/ugd/0047a4_66072f92371b4d0aa8c2b96a3124d262.pdf
    • https://static.usrfiles.com/ugd/cafc24_b3caef6cda9444cf87fd197e63042b23.pdf
    • https://cdn.shopify.com/s/files/1/0434/2566/1095/files/92994174791.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/xogawixilokejinuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/tezel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8476/5602/files/data_analysis_with_open_source_tools_ebook.pdf
    • https://static.usrfiles.com/ugd/5b5da7_502fc859a69f42d8a098a48c350aadac.pdf
    • https://static.usrfiles.com/ugd/34ec99_4694fbc4a9bf489e85b7f94e8c43a313.pdf
    • https://static.usrfiles.com/ugd/79cb75_2aa46b31f12d4217bfe8acadfbf5ade3.pdf
    • https://static.usrfiles.com/ugd/cb5dea_029a1c7917de454fb0b88cfa8a55f46a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eecf3555d2324c12a924b07dbb9659c8.pdf
    • https://static.usrfiles.com/ugd/79e0dc_12986ecdc9ef438cae06806890b66959.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_off000062ef.bin
310c3bb57c20f3fb94202a3df41eaedde43911abf0bb728bda255f24a639779c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 5484 bytes
font_01_sfnt_off00007598.bin
075291e402a9121f4c1e52a75bde039b6fafeac74fe6ceda0aa661c3ab536072
pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 10216 bytes