Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a09a6cb68dea810…

MALICIOUS

PDF

43.4 KB Created: 2020-08-09 09:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 569b0bd1da23f60ad98f6bd27669c6fc SHA-1: cc2481e88f9f65e5c338ded37368643600946934 SHA-256: 6a09a6cb68dea810275fca4c50efb51a3b53716248ff0c376b1e4735601b95ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external websites, indicating a link farm or redirection attempt. The primary malicious link identified is https://ttraff.com/pify?keyword=playing+1+d4+the+queen+s+gambit+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting potentially harmful sites.

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/pify?keyword=playing+1+d4+the+queen+s+gambit+pdf
    • http://files.kiwibokke.com/uploads/1/3/0/8/130874691/b581b2036606d.pdf
    • http://files.stevehowell.net/uploads/1/3/1/3/131380345/6248169.pdf
    • http://files.decadescoffee.ca/uploads/1/3/1/4/131453733/rilibotewovodenaju.pdf
    • http://files.blackrosesdartscharity.com/uploads/1/3/1/4/131452824/8540814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/pokemon_black_2_rare_candy_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/96194869246.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/fozugaxadojinuzijakax.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/s_chand_ca_foundation_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/bawiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/telanin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/lumododoxodavuworu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/properties_of_addition_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/mipexegidowik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/caftan_pattern_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/82004752731.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/mathematical_statistics_with_applications_7th_edition_solutions_manual.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_off00006a33.bin
de783ef55df46762939181a8832b75d85fbba2c4a4042a0bf00f559468fbbe74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A33 5868 bytes
font_01_sfnt_off00007e18.bin
5893456796b3e08b86e8d41a40d16537679aba91a8e1831cb5801f92e8696cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 10192 bytes

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