Malicious PDF — malware analysis report

Static analysis result for SHA-256 67edb5db2a8e5af1…

MALICIOUS

PDF

42.0 KB Created: 2020-10-26 01:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1516f8efc3fbf5efa6ca2da120b604e SHA-1: 9fa0335e72a908610c46ca5ef24789501026e3c1 SHA-256: 67edb5db2a8e5af1ce64aaf939db144b4234dc65eb8320cfe1599f953623c7d9
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.club'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/123?keyword=my+senses+worksheet+pdf', suggesting a phishing or malware distribution attempt.

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.club/123?keyword=my+senses+worksheet+pdf
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/sifofokosu.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/wapon.pdf
    • https://velebipuzufal.weebly.com/uploads/1/3/4/4/134434208/1672653.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/057d476.pdf
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/c437f4.pdf
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/lovebabodibedojuxo.pdf
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/c925585b14772f.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sasewoni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leguvefu/biopsicologia_john_pinel.pdf
    • https://s3.amazonaws.com/zijivevip/platformio_tutorial.pdf
    • https://s3.amazonaws.com/gedimuta/6400126637.pdf
    • https://s3.amazonaws.com/janodojivi/basic_vocabulary_words_with_meaning_in_urdu.pdf
    • https://s3.amazonaws.com/firigugixujotov/sevutodebofawawo.pdf
    • https://s3.amazonaws.com/zetare/xomurepizokaf.pdf
    • https://s3.amazonaws.com/guwutivupudutu/19725458615.pdf
    • https://s3.amazonaws.com/tetazino/44008701810.pdf
    • https://s3.amazonaws.com/jamokaroxoj/10881207049.pdf
    • https://cdn.shopify.com/s/files/1/0479/1753/1302/files/stickman_revenge_2_ninja_warrior_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0492/2939/8182/files/appvalley_for_android_apk.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_off000066f5.bin
fc17641be8d4172c257cd1dba48834ebd80a57a2c53e679533febf8612d55e79
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 5148 bytes
font_01_sfnt_off00007891.bin
534c69c76db6c4782795f731047f84c358f094bed8b4b178ec18a9ee985e9d78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 9940 bytes