Malicious PDF — malware analysis report

Static analysis result for SHA-256 702ee62927f1f387…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 07:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f4e55258758e3ebb9f4e46e82da3fcb SHA-1: 6de9514bde8d9cb80c36b83111f0eaa82c7e2068 SHA-256: 702ee62927f1f38732429497eea2040e326dda3dfe3727056ef85e8368b0d75a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm designed to distribute malicious content or phish users. The document body itself contains obfuscated text and URLs, further supporting the malicious intent.

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.cc/pify?keyword=kimya+bile%25C5%259Fiklerin+adland%25C4%25B1r%25C4%25B1lmas%25C4%25B1+pdf
    • http://juwovu.kristinsmithcrowe.com/uploads/1/3/2/7/132712615/fewajanam-puraxil.pdf
    • http://files.dippedindope.com/uploads/1/3/1/3/131379353/fodibomibojok-womuzusom-xivubowerunu-tapakesoka.pdf
    • http://fedupeto.anewbeginningpreschool.com/uploads/1/3/2/8/132815367/nadubidabit.pdf
    • http://files.frankicolett.com/uploads/1/3/1/3/131379830/ladipekige-wubekiwopiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/iicrc_s500_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/43829093187.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4506/files/gorefujapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/how_to_indent_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/43377079915.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/php_multiple_file_upload.pdf
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/mapevubiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/dadezokibegad.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/gamasakab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/96632328899.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/71899137652.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/bapijeketosuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/binary_and_hexadecimal_number_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/19873400828.pdf
    • https://cdn.shopify.com/s/files/1/0432/5054/8899/files/lorikefajafozu.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_off00006de1.bin
f0294965cd74d2701cc20376fcac57cb00c364aa52830d23c7e59ec3032a6f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 5740 bytes
font_01_sfnt_off000080d5.bin
d1a241ce41755fa2ce56690a2c6ee66333b0c34caf1f7e553d8f692003dec5b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 15620 bytes

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