Malicious PDF — malware analysis report

Static analysis result for SHA-256 d328b2b1beee166f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 04:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff1bb383d2a2eee965764f22d10a9a91 SHA-1: 6696c39ca0b834bf5f35e4179c01e3b102ca7736 SHA-256: d328b2b1beee166fe7bb63156ead4d3dd30d7a1aa5a898e8ef6c408f9e023dff
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as 'inspirational quotes for students pdf'. One of these links, 'https://ttraff.cc/pify?keyword=inspirational+quotes+for+students+pdf', is identified as a malicious redirector. The document body is heavily obfuscated but contains references to the malicious URL and numerous other PDF files hosted on various domains, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious infrastructure through deceptive content.

Heuristics 3

  • 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.
  • 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=inspirational+quotes+for+students+pdf
    • http://files.bluebellhill.org.au/uploads/1/3/0/8/130814605/374201.pdf
    • http://xoliboduk.amyshomedaycare.com/uploads/1/3/1/3/131380213/2e02c3a928.pdf
    • http://files.bethelroyalheirs.com/uploads/1/3/0/8/130874143/7727158.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/rojamikiterizilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/8142731845.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/bridge_of_spies_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/12649901586.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/bachatas_2015_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bernoulli_differential_equation_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/fuxewokezufod.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/pesupizajibuzepudovaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/8349403840.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/binakexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6326/3910/files/pre_algebra_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/29557966404.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_off00006680.bin
54ce51cdcf3b28c9a2a8f7f23b1c9e4677c7c985192135be59d936bc2be49c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 5100 bytes
font_01_sfnt_off000077d5.bin
5f65dc3c5984b00618a328970797f760e758ad3c42d7fdb02da2a95fec7fb451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 10344 bytes

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