Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b279399bac748f…

MALICIOUS

PDF

59.5 KB Created: 2020-08-31 01:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e05cdcc2fd99714fb3b75ef7f80d9fe1 SHA-1: a78dc0c0b66a2898797d0c51a3eecd894f7679b5 SHA-256: 68b279399bac748f4f088d56b328a1fd885263f4247ad78dc5bb6a907a533037
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the URL and text that could be used as a lure. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt.

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.com/wix?keyword=plutarch+on+sparta+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/35045844259.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/cha_cha_slide_audio_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/fodikolos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/koxupexekufajezijurebuxab.pdf
    • https://cdn.shopify.com/s/files/1/0447/9349/5709/files/tazerikovixarade.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/application_form_for_korean_visa_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/murabojijosibiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/59474789174.pdf
    • https://cdn.shopify.com/s/files/1/0440/5978/7414/files/michael_connelly_the_burning_room.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/jopagujuzulazekojuwido.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/99427759430.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/kebexiwowalumipofitetaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/clothes_design_body_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/8782/0968/files/zewumosogudor.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/dadivisepesexebekaraxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/baradit_synco.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/wowurukirabuwepaxafalepe.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/mapa_de_metro_amsterdam.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009688.bin
bc24f6678278c14486f5c60ffe40296632bb7db0f162c0768c547139049eb134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9688 5244 bytes
font_01_sfnt_off0000a849.bin
300f94ff016ea8763c82ebdf47fbba30d9d78d5fce595df471fb67bf93266880		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA849 9944 bytes
font_02_sfnt_off0000ca94.bin
6461d03dfead1b489f82803722784e62d7597b07b125e5a2b6c5f12ec4e782ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA94 16336 bytes

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