Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f87470d688067e…

MALICIOUS

PDF

65.6 KB Created: 2020-08-28 00:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ac5c35e04f34218b2a16e90f038e29 SHA-1: 3da1daf317411e3e5afb4a9377a78634b6389681 SHA-256: e2f87470d688067ef77e25fbbd8c85bf15fa8ea2ab7fdb081c6918e1f749f440
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. The document body, though partially corrupted, suggests a lure related to 'html and css 6th edition tutorial'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the embedded URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting an attempt to obscure the malicious destination or to appear as a legitimate resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=html+and+css+6th+edition+tutorial+4+case+1
    • http://files.algerparkchurch.org/uploads/1/3/0/7/130776249/9554707.pdf
    • http://fagupitu.artisticvegan.com/uploads/1/3/2/3/132302870/4872743.pdf
    • https://cdn.shopify.com/s/files/1/0448/9674/7687/files/kafanawulezida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0462/0268/3545/files/management_of_kounis_syndrome_two_case_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/tonogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/celtiberia_show.pdf
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/pibunurakurisusewibekexap.pdf
    • https://cdn.shopify.com/s/files/1/0459/5902/0703/files/rosalind_krauss_notes_on_the_index.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_off0000abff.bin
f5dca4d49c332347474667ca6d4ce50d411647dcdc25792e6edc038dd2de123e
pdf-font-stream PDF embedded font (sfnt) at offset 0xABFF 5316 bytes
font_01_sfnt_off0000bdd7.bin
050b615c6e26d7a90e640068b123aa3b2ad3dd06376cbdfc3e205fb4e4f16457
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD7 14204 bytes
font_02_sfnt_off0000eb1d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 4324 bytes