Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd254394b94aa51…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 07:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3f447b42dea3fc6579cc61507bacecf1 SHA-1: 93bd1f2241d74cf4c9466fd136de7a3ec6a2db2e SHA-256: 2bd254394b94aa510d57eb2c8f343028ec4ca24aee57a284503ea6c4db2bafd5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external links, one of which is to a potentially malicious redirector. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the embedded malicious URL is the primary indicator of compromise.

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/123?keyword=kimi+mayan+god+of+death+facts In PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/3a4aa33d155b58.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/bafab_devapekixiwumi_zudapufuloz.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/7349474.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/7118423.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/pdf_to_word_converter_nitro_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/61123791249.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/mavaxadavanolowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9689/5391/files/math_2650_auburn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3981/5361/files/12344974129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/polka_dot_fabric_black_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8087f75f-18a8-4215-9ceb-443369f4f2b1/15428253195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f6ed19-6e16-4e24-984e-e37bc3c29a82/dixuvusirotupew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51273737-1a5a-47f9-912e-48fb839f2c89/52709879156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e11338e-80da-4c1f-9d9b-cde0aa27ea7a/58012185425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152f3578-1c13-4c42-88b5-3ee0858e7fa1/nikon_coolpix_s3100_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/temple_run_game_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6436/8021/files/girl_scout_junior_uniform_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9852/9699/files/dixukurizulafagusamug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8327/7491/files/pijozanawepuwifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/53551992560.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/xenirura.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/55247437902.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/ganorekugevedusobubaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/litizanoga.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_off000078d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 5376 bytes
SHA-256: a5362bdccc9b3492590544388a4fdc939be7d5b88cc7798d9bc24c04824259f2
font_01_sfnt_off00008aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFF 10248 bytes
SHA-256: 23afbfdc43e380c1cda321d708faca4805b6ff597bdebc1358bfd416f4d27bf6

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