Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daa0655793d6668…

MALICIOUS

PDF

38.3 KB Created: 2020-08-18 18:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da2ff7b87a0a43b8377df8bb823d31fc SHA-1: 411b66419abb6f1b32f6479c106a4f23b6c7f0d1 SHA-256: 6daa0655793d66684e8f586810a4d32debd7b8f68dc9a09f0adacf0cbff3a370
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.com'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=boolean+algebra+mcq+questions+and+answers
    • http://vanov.askweklar.net/uploads/1/3/0/7/130739240/zalemaf_ziliko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/cerere_inmatriculare_auto_vrancea.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/nolawizebanofegoniked.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0433/0559/9140/files/21329085150.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/91761637861.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/bootstrap_form_login_signup.pdf
    • https://cdn.shopify.com/s/files/1/0454/2342/7752/files/analogy_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/dazajorosanelede.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/sidoladatoderofom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/neon_genesis_evangelion_n64.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/navien_npe_240a_manual.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_off0000567f.bin
1ce7f222ba8aa14d65a4233700d35c23fdb2d17b8f1c85639a7061183ea03575
pdf-font-stream PDF embedded font (sfnt) at offset 0x567F 5664 bytes
font_01_sfnt_off000069b0.bin
3ae6b01a5fca850d7df052e203702a5797122b7e20d3849677c1d4107b550869
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B0 10224 bytes