Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb3bf9f3cb26c8e…

MALICIOUS

PDF

46.5 KB Created: 2020-08-06 14:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c78a7c7344bf1702f1a69f6fceeca531 SHA-1: c6ff5ac73c0a264b5f0923eb972d9e28dcaafe56 SHA-256: 0bb3bf9f3cb26c8e962e7a626e046be21dff2ff0d93e30ffef3d757ee90e50d9
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed to manipulate search engine results. One prominent link directs to a malicious redirector, suggesting an attempt to lead the user to a malicious site under the guise of providing a 'carding machine electrical diagram pdf'. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports this. No scripts were extracted, but the overall structure points to a phishing or redirection scheme.

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=carding+machine+electrical+diagram+pdf
    • http://files.utadrc.org/uploads/1/3/1/4/131454304/zagabofisilowu.pdf
    • http://files.mrandmrsmusicco.com/uploads/1/3/1/8/131858481/funemiz_suxikijapopi_bosoz.pdf
    • http://files.streamlinenation.net/uploads/1/3/1/4/131453843/3d069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/16121117192.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/peta_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4304/files/hunger_games_book_series_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/shawshank_redemption_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4871/files/54028170052.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/wotetafesofekabofuruwazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/89123463923.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/jojamimevowaxuxadutuzir.pdf
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/saloladamiteza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/luguvulubij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/avancemos_2_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/vemajadeximebefu.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_off00006b93.bin
1cd7ca9bd81f66453c4bf793bb2d64e1f7db413bbbe6dcc42bbbd27cdb0b74b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 5296 bytes
font_01_sfnt_off00007d6f.bin
31350a489427abe3c0d6e64b1b941607bda173e51a93dab5d9804781da2afe23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 15064 bytes

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