Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f5a913e85ee1cd…

MALICIOUS

PDF

44.9 KB Created: 2020-08-07 13:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81dd381f8a5a1aba6229181bc067d41a SHA-1: 621b2ba65afe5a1a4ed90732818140b28032685a SHA-256: 69f5a913e85ee1cd1da89e164779365f19fa16c030de5bb6c7eedb1d5c332c89
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.com/wb?keyword=manuale%20digitale%20istorie%20clasa%20a%20vii-a, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF's nature and the malicious redirector indicate a high likelihood of 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.com/wb?keyword=manuale%20digitale%20istorie%20clasa%20a%20vii-a
    • http://files.imaginesullivant.org/uploads/1/3/1/3/131384555/vuzamuluvowexi-bivaxopozesep.pdf
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdf
    • http://files.cherylsteventon.co.uk/uploads/1/3/1/8/131856278/fbee67288fb193b.pdf
    • http://files.gnauart.com/uploads/1/3/0/8/130874254/b7ed239372c8f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/que_es_el_amoniaco.pdf
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/39934234557.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/rebewosulixis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/34334138409.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/58355089275.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/sukotunokenexeratix.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/18409876973.pdf
    • https://cdn.shopify.com/s/files/1/0431/7875/4199/files/zekukepijosemerazobut.pdf
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/misivarozalatoxemuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/xbox_free_games_september_2015.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_off0000709f.bin
2e4bb943240816f7e7eb46aaf9f2513daf1345680a84962a32cfb96b90cb902f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709F 5204 bytes
font_01_sfnt_off00008281.bin
88a42edaa636f33409548b05e6984301a17048c0247ebe81f49e3155e357d24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8281 11276 bytes

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