Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c63dd69efdf380…

MALICIOUS

PDF

114.8 KB Created: 2020-08-19 02:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36119922ec0fe7d9590a2b4c8c92d408 SHA-1: bf82d1556ccf1b3f73723c2f9771c44f6e7581ca SHA-256: 11c63dd69efdf380a71e982d6f85a5bf410eb08404ff260718ca51cf82d31de6
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=strictly+come+dancing+2018+final+format'. The document body also contains urgency language, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=strictly+come+dancing+2018+final+format
    • http://files.help-me-learn.com/uploads/1/3/1/6/131637814/sixewanuxeriwu.pdf
    • http://nejexodu.vybephotography.com/uploads/1/3/1/0/131070420/bapabopudenulewom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/85558804738.pdf
    • https://cdn.shopify.com/s/files/1/0451/0502/1091/files/numugezofudiwizazudatati.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/bolt_tightening_sequence.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/vanajuvedidagex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5749/files/lateral_thinking_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/93612186889.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6565/files/sri_narasimha_kavacham_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/tuvawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/65687953059.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/2511762668.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/art_and_artist_rank.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/supufujiginak.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_off00018372.bin
8cd6fb01242a6d7d4d8af38bc5a304f94c982747c21072759407ec9827b8c11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18372 5888 bytes
font_01_sfnt_off00019766.bin
9f0808c8fb30e613a05962b956b23fc73dd4dcc3679f6bde9c539a6b39e150a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19766 11284 bytes

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