Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e525211c6aadd63…

MALICIOUS

PDF

39.1 KB Created: 2020-08-18 17:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e446cc0ed04b7093b901a7bb69ef0922 SHA-1: 6dc9afd64c6ecc03ce8a529fc3c4180422baff9e SHA-256: 7e525211c6aadd63204d547faf5a394a25b31095fb0164665dd20ec4758342e1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=hd+screen+recorder+for+windows+10'. The document body also contains this URL, suggesting a lure to download potentially malicious software. The presence of embedded URLs and the ML classifier's high confidence score indicate 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=hd+screen+recorder+for+windows+10
    • http://files.andyyangcounseling.com/uploads/1/3/0/7/130775950/tufanuruvukidunuxere.pdf
    • http://dipado.salmoncrazyadventures.com/uploads/1/3/1/8/131856772/goleluxifoz.pdf
    • http://tanog.evergreenpark1171.org/uploads/1/3/1/6/131636725/1b1aa51d13cb.pdf
    • http://files.aubshealthysmartline.com/uploads/1/3/2/6/132696558/6221358.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/23623027303.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/beludaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/peruzerurim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/26169388922.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/18061093686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/kenabur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/nukegivadorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/gitapumexok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/statistical_data_analysis_explained.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_off00005cf0.bin
6fba5eced603f18c2d847ffd7ced780955abccfc465c5ebb061701d8a133d8d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF0 5020 bytes
font_01_sfnt_off00006e2a.bin
989d807cc0e10417bfcfd816a7aeef49a4302819883dababd8f5b4dad3e37602
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 9800 bytes