Malicious PDF — malware analysis report

Static analysis result for SHA-256 1682ae46b07d25de…

MALICIOUS

PDF

113.1 KB Created: 2020-08-08 14:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140629c7fd26e3f66df654df2bf0918c SHA-1: 7c1ac89980ec252399518dcf6a8a5b84239ba6b5 SHA-256: 1682ae46b07d25de3369ea994468daf40116f1e1fb51183f1bebf8a0a287f1df
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=paracetamol+mechanism+of+action+applications+and+safety+concern+pdf'. This URL is likely used to redirect the user to a malicious site for phishing or to download further malware. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute content broadly. Although no scripts were extracted, the presence of malicious links and the ML classifier's high confidence indicate a 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.cc/pify?keyword=paracetamol+mechanism+of+action+applications+and+safety+concern+pdf
    • http://files.tommytrenchard.com/uploads/1/3/2/6/132682868/2604567.pdf
    • http://navutipam.nssla.org/uploads/1/3/0/8/130874524/pimaj-mexipogapezigen-livofumupefimub-gigozunox.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • http://files.handcrafted1995.com/uploads/1/3/1/3/131379706/zogaziv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/bomojejituboki.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/nulepotudegemewetisip.pdf
    • https://cdn.shopify.com/s/files/1/0445/4485/2127/files/pdf_to_word_ocr_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/31980891546.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/xuvededuzogevezowasamipig.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/41906171480.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/tefiwanosivunajurajeket.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/mupugovafutefaponu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/16140929083.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/96158111974.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/palotij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/gexomowe.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016397.bin
502113a6462eb0a7e3f46f66f93a10b106827cfd50a400cb01fdf33a765a59c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16397 5496 bytes
font_01_sfnt_off00017626.bin
48936ca11dfcffa6e34b767784424a0e0fc1f3dcfe5ad3e5cdb162590583d033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17626 11912 bytes
font_02_sfnt_off00019eef.bin
f4f5fb0209a4714c3cbdfe9b8e29dbdabffe5d2cbe58e8cc741460ff97ba63ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EEF 16100 bytes

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