Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f4b4e02baf1544…

MALICIOUS

PDF

39.8 KB Created: 2020-10-10 17:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 292ecc46ac5940c3fe5ffe00c3d37e6a SHA-1: bce6b21333f233b9c84db48a4c816d640891ccc5 SHA-256: b4f4b4e02baf1544576b05a5210d4d1e36b00f6ecae106a99188224852904240
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=themes+in+the+outsiders+prezi', which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted documents, suggesting an attempt to manipulate search engine results or distribute content through a large number of seemingly benign links.

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.club/pify?keyword=themes+in+the+outsiders+prezi In PDF document text
    • http://files.notarybezzina.com/uploads/1/3/0/8/130814353/vizosomobuwifixu.pdfIn PDF document text
    • http://files.beleaflabs.net/uploads/1/3/1/4/131452735/5b40b.pdfIn PDF document text
    • http://files.mistyhollowlabs.com/uploads/1/3/1/4/131453329/kirexubapi_nupujiroxepe_jumabijexaduk.pdfIn PDF document text
    • http://zazol.theprofbodyforum.org/uploads/1/3/1/4/131408899/tadudijemagire_daduvizapazazi_kipipujenir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0662/3384/files/oil_drop_experiment_khan_academy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7228/9944/files/honeywell_tower_fan_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/jomosiwedesulela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3348/3674/files/vocabulary_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/83946322551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2868/4212/files/tugutolebepawarizifuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4202/0769/files/autozone_inc_case_study.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/us_navy_record_of_enlisted_counseling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/lo_mucho_que_te_quiero_letra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/2423064776.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_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 4956 bytes
SHA-256: ce7c4b1c1780b314c09cd3f496f4ab30d80ddd9f65d9feba6dd516e20789771d
font_01_sfnt_off0000720d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720D 9488 bytes
SHA-256: 352540e100073dd35e7c8b45e5695a7dd852f4eaff82390bbbdaa3cfe7504849

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