Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9789325b8ed691…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 15:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e19e99945ca31c87f86c9aefd665a8f SHA-1: 86baaaa830fcb7eff0cb0e3c9a575bf7ac97c27c SHA-256: 6e9789325b8ed691255c09c759e86b7e3ce08d11f7068888985277ec7a5c5462
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 a link farm designed to manipulate search engine results. One prominent URL, 'https://ttraff.ru/pify?keyword=bugatti+shoes+size+guide', is flagged as malicious and likely serves as a redirector to malicious content. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for users seeking product information.

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/pify?keyword=bugatti+shoes+size+guide
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.eviolinguru.com/uploads/1/3/1/0/131070009/dizurunamefizag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/pdf_document_split_merge_software.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/zuniruwafeja.pdf
    • https://cdn.shopify.com/s/files/1/0446/8106/8697/files/identifying_sensory_language_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/fubed.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/29500206023.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/agriculture_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/tetris_t-_spin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/masary_real_love.pdf
    • https://cdn.shopify.com/s/files/1/0447/1504/9116/files/arquitectura_bioclimtica_y_urbanismo_sostenible._vol_i.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/html_to_c_itextsharp.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/52257162250.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7641/files/ligopulotanufinanubibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/69784791389.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/good_will_hunting_subtitles.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_off00005f81.bin
2952a07e6b352117142018d5169d3dae57ba795245fc5ba57c414fca0e62a7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 5060 bytes
font_01_sfnt_off000070ba.bin
4db71bf28f23bb096283e8fb3435b1addb945b888b0a045c89bee6671e024132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 14612 bytes

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