Malicious PDF — malware analysis report

Static analysis result for SHA-256 05672478e498d03a…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 03:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a033a273c6fdb1b968b4e81a9406e4 SHA-1: 7df574839c5be801f3364840a500404b4da77509 SHA-256: 05672478e498d03a48e38efb8ecce84559245e4b85c0837fe16672f98d0a1f86
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=origami+dragon+pdf'. The presence of a visual download button lure further suggests a malicious workflow. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=origami+dragon+pdf
    • http://files.sweetdreamsweddingflowers.com/uploads/1/3/2/8/132814272/5436741.pdf
    • http://files.katiedunivan.com/uploads/1/3/2/7/132741241/xugilirujazu_fatuvebizonosi_rikekijivokibof_zavonemewuvugu.pdf
    • http://files.smarttc.co.uk/uploads/1/3/0/7/130739210/dutogemevuj.pdf
    • http://files.mycccamp.org/uploads/1/3/1/4/131407944/bea81ee21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/15521924229.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/96059593860.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/nevudatotatemadutunivew.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/bunchems_instruction_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/bikusapemutedimilejunip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/frost_dk_bis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/rutemobem.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/lemasawurovixenebotu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/pejikijonijolixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/57948015185.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/72314712677.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_off00005e5f.bin
6e2b078699549987b989e0f3eeef07f8685ab82681d4f18ae263fbd26c88e2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 5176 bytes
font_01_sfnt_off00006fe5.bin
b9bc98ea6eb1169ff9553a355d797b90aba3334420cc0181f87b7554abfaf374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE5 10080 bytes

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