Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a939ef0e419a909…

MALICIOUS

PDF

39.8 KB Created: 2020-07-09 08:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab6e2b6db6932fd0d22c9085bb24210 SHA-1: 85a3c5fa764016c609216cda53b599d9536a6ab6 SHA-256: 9a939ef0e419a90975cdd290546a59f4bfc5268aa01a1096c1882438bd4d6755
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body text, though partially corrupted, mentions 'Lg steam dryer instruction manual' and includes a suspicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=lg%20steam%20dryer%20instruction%20manual
    • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdf
    • http://files.strips.ie/uploads/1/3/1/3/131398386/9259378.pdf
    • http://files.refresche.net/uploads/1/3/1/4/131454549/pabogila.pdf
    • http://files.autospacanada.com/uploads/1/3/1/1/131164204/a2f733222a3b.pdf
    • http://files.gradeeight.nestmusic.org/uploads/1/3/0/8/130874467/6db7fe27d8bab.pdf
    • http://files.somonaukwrestlersclub.com/uploads/1/3/0/7/130775940/wetabuwivipogoxivaf.pdf
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdf
    • http://files.workinnvision.com/uploads/1/3/1/3/131384018/zudemesenodevakani.pdf
    • https://cdn.shop
    • https://tekunotu.files.wordpress.com/2020/06/gubapenutakudiparavabi.pdf
    • https://fijozipevevo.files.wordpress.com/2020/07/1408590337.pdf
    • https://jilijufupe.files.wordpress.com/2020/06/pedesimozavutuj.pdf
    • https://wijevikase.files.wordpress.com/2020/06/85904160231.pdf
    • https://liziwix.files.wordpress.com/2020/07/10734428570.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae8.bin
3284ea6e67fea96828e6efee80fccada72338c1ab2ddc7c9b273c9d858eeab73
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 5184 bytes
font_01_sfnt_off00006c75.bin
ad8f3474f47f1c8688adcbaaeda03eccc70025ce3839b674aa65ca0fed7bf700
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 10964 bytes