Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6e2846d86d63af…

MALICIOUS

PDF

38.7 KB Created: 2020-07-08 16:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b116791ebfa76da1322a5d150944c5f SHA-1: ade07e73d7ab641b0b1d0c589995e7b39ef3f71d SHA-256: dc6e2846d86d63afe85e716ca5f7eb725e65a75fbebb92a219891b3d62883a74
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as 'ttraff.com'. The document body, while appearing to be an educational worksheet, is used as a lure to disguise the malicious intent of directing users to these external sites. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a campaign to distribute malicious content or phish users.

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=angles+in+parallel+lines+worksheet+ks2
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdf
    • http://files.theworldofmcewan.com/uploads/1/3/0/7/130738814/gibaja_tawix_wododibura_musimetal.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • http://files.debbiegranick.com/uploads/1/3/1/4/131437648/cc9ce5e.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.mghbefit.com/uploads/1/3/0/9/130969046/bumok_jewolaxosavasi_jefuk_dujoman.pdf
    • http://files.motherwrenstudio.com/uploads/1/3/1/3/131379552/bevezikifozejeledo.pdf
    • http://files.handyvillage.com/uploads/1/3/1/4/131409709/3432559.pdf
    • http://files.froshcab.com/uploads/1/3/1/3/131384101/mepiridapotafoka.pdf
    • https://wikepuj.files.wordpress.com/2020/07/30454314192.pdf
    • https://jawedoti.files.wordpress.com/2020/06/mavaf.pdf
    • https://tanudabu.files.wordpress.com/2020/07/39264406067.pdf
    • https://bakovenorow.files.wordpress.com/2020/06/5624314709.pdf
    • https://najegivore.files.wordpress.com/2020/06/ravupisiwoxot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ed1.bin
ef0e969665208222a0963d099eb03b1b345285ba73a9eec3724088ed9790b9ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED1 5148 bytes
font_01_sfnt_off0000604c.bin
7a84c6cf4f46d4bac8fb6ba896b1cdf686c60a6b9912cc82b79a416172af7d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 3128 bytes
font_02_sfnt_off00006d0c.bin
18a1753a4090bdc1ef6dced30155d7b48fbb942274d4732676da7836079bca04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0C 9392 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.