Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b84facbc870d1f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 02:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e93d886847b7619ce7330ed636966aaa SHA-1: 1f6e966a4e4336a3e916424c5433dbd9689a2a18 SHA-256: c0b84facbc870d1fcb50286a3bccf75cc3db55bb844de9b40912e8cbc41d4b52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=beautiful+birthday+cake+pics', suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=beautiful+birthday+cake+pics
    • http://fafatozit.mrmsworkshop.com/uploads/1/3/2/3/132303374/7a6df.pdf
    • http://xilobilo.troop372tx.org/uploads/1/3/1/3/131398101/511573.pdf
    • http://files.lirielbijoux.com/uploads/1/3/2/6/132682919/zududulesalinoteza.pdf
    • http://files.horticulturalpruning.com/uploads/1/3/2/6/132696483/1109fd13007.pdf
    • http://files.tugcekarapinar.com/uploads/1/3/1/3/131379312/80fc8.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/komaretenef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/tropical_garden_plants_by_bose.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/98942885131.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/rakapezujabomidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/wosuso.pdf
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/reproduction_in_angiosperms.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/barbara_kruger_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/pengaruh_budaya_hedonisme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/find_the_volume_of_each_cylinder_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/du_sol_result_2018_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/danagexinejone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/39729485573.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6205/files/cscentral_amazon_com.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a7.bin
9257e2507fb26f43f7d6d80eeb6ca9caf4d9461461a5e7021dcd687faa8fc681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 5600 bytes
font_01_sfnt_off00007ba6.bin
c21d31aabe7963e220a1fe58437e49648513d97b8de9e9dab155c71a1e1da7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA6 10416 bytes

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