Malicious PDF — malware analysis report

Static analysis result for SHA-256 7324d6b4c481af4e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 10:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14470ab1f8f56a24780e1c3d80820301 SHA-1: 90dc97fc99d08a6469d95c8b4d5ba9754cbc7bd5 SHA-256: 7324d6b4c481af4eca86406907590f41dabfbcfc56f79b9888e8c5ca12470365
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=the+human+brain+pdf+download'. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

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=the+human+brain+pdf+download
    • http://files.futurebanktoday.net/uploads/1/3/2/7/132740281/2664038.pdf
    • http://files.love4picnic.com/uploads/1/3/1/3/131398129/xiwosiw.pdf
    • http://files.christislifeministry.org/uploads/1/3/1/0/131070469/c12a123bef45.pdf
    • http://files.emmacolley.co.uk/uploads/1/3/1/3/131398555/xoxamipal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/76834986513.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/cranial_nerves_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/jinobiwadugiturov.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/wimiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/wps_to_word_converter_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/alimentos_altos_en_calcio.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/jedujug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/ferdinand_the_bull_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/8549061465.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e1.bin
f12c592f443b65540fa3273a78775c843647606ea78932a228699c23edae1e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 5088 bytes
font_01_sfnt_off000072ff.bin
14f880660ae08a45cfa207434816e30ad423852682a44a0f37e5ba805edecd26
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 9928 bytes
font_02_sfnt_off000094f2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x94F2 4324 bytes