Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fd2a73c8a224be…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 11:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 21f073f99ac8c1210a196fb11b9fd877 SHA-1: 2cc3f2287715373f22d96447be625b303fbff7e6 SHA-256: 14fd2a73c8a224be2c1c12b99b2a4ee47f5f17aeaff3b754136a9b1f03b0efa0
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 of the primary links, 'https://ttraff.ru/wix?keyword=how+to+improve+english+communication+skills+quora', is flagged as a malicious redirector. This indicates an attempt to direct users to malicious infrastructure under the guise of providing educational content.

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=how+to+improve+english+communication+skills+quora In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aad08d6135b14cf6b8a216cea17e477a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c7ef1a_a3c09f84a404410d95bce838eba1a39a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/60933b_12a7ed9c44234ad28c1c60341b412586.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ebea13e3c4a541a6bf99565aba021981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/9510/0311/files/akuntansi_keuangan_menengah_berbasis_psak_buku_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/30350379274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/delosedul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9635/0626/files/juwav.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b47706_fdc47c3e5115465c9af92718efd35818.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ef2bd8778cf849fd9c7f220d72f0503f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab922d_376c7db2529446edb7b840acf7017ef7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b8612_8549849f73ec41f5be6480e07e00a82e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b444d4_ea5145bb24f04b6c94b51992cc04d0a6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 5648 bytes
SHA-256: d2fcaf1faea5bddbb596826aafd0701ee1bbe654061c2ecd996c9f817e72b9c0
font_01_sfnt_off00008321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8321 10776 bytes
SHA-256: defeb0d31f381fac4c7a72649ab460077c204d70122d9fa04412839201f11583

Open this report in the interactive analyzer, or submit your own file for analysis.