Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ccd65f9c3589c2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 10:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1736ebb2a696662a70b5deaa5fc6d9db SHA-1: 5d584dc3ccc833db4d19c4eeceef81bfc3d5d650 SHA-256: 72ccd65f9c3589c24694f187051312677bbb0ab357a6735f05e023be6dd486c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=analytic+hierarchy+process+excel, which is flagged as a malicious redirector. The document body itself contains obfuscated text and URLs, further supporting the malicious intent of directing users to external, 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=analytic+hierarchy+process+excel
    • http://files.engagewithease.com/uploads/1/3/0/7/130739916/gugozufo.pdf
    • http://files.mountainviewneighborhood.com/uploads/1/3/2/6/132681969/fetekuwaded-wijiredig-zilofuku-fazisamiko.pdf
    • http://files.kathleenmercury.com/uploads/1/3/1/4/131406036/tijurut.pdf
    • http://libixi.frlabradors.com/uploads/1/3/1/3/131398140/kufiti.pdf
    • http://files.narinsedc.com/uploads/1/3/1/4/131437064/jinufonuzita-fefifopase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/1680350128.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/geology_of_benue_trough.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/fosatazunatofati.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/38055295516.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/mulamazaliloxewibijezok.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/form_mail_scripts.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/alfred_adler_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/tevodena.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/89530564342.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/xaxofavikuxirem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/6517993299.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_off00006703.bin
39593137056de9a0aff2ed7d11bd30329d3637619775ab8ffbaf2412355c391f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 5180 bytes
font_01_sfnt_off00007897.bin
b2e0cb82eed3bc97b7ada4ec2851b2b523d102ab500d10affa7f81700d5ed3b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 10600 bytes

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