Malicious PDF — malware analysis report

Static analysis result for SHA-256 162b9f4b3c449c77…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 17:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c49bcabe5ae186021d5578fcc5c9d49e SHA-1: 351fc510c5666da0200082f5be2dd9f2680e2012 SHA-256: 162b9f4b3c449c77ea49f7c1c2dd7d54477f2ef0d27c75d0dd59f0b47371e0c4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to financial transfers, aligning with the 'Fake invoice / payment lure' heuristic. The presence of a large number of external links, many pointing to PDF files, indicates a link farm designed to distribute malicious content or traffic.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=rbs+chaps+transfer+form
    • http://fulotiwe.kingstrengthperformance.com/uploads/1/3/0/8/130815009/dozuwesawada_norof_rarifaleli.pdf
    • http://files.thyfaulttough.com/uploads/1/3/1/4/131452976/guxafoxapivu.pdf
    • http://files.glcconcordnc.org/uploads/1/3/1/1/131163959/955ad57d49a1bbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/zonarajixid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/wow_tabard_of_the_achiever.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0642/files/lubojawezexevijafuxibi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4650/9461/files/so_this_is_christmas_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/fulizoxejam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/wexexekononunuwibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/xetuwekobezomamibeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/cardiovascular_system_of_human_body.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/algorithms_illuminated_part_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4031/files/pegojamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/netuxujukinofedizekonid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/puwujenogurunilumetidak.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_off00006a29.bin
957c41e78ee53184ac6abc1954093e6535650204934ea9085924870bdd378114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5368 bytes
font_01_sfnt_off00007c39.bin
2e1ccb85802f56cbb7705b3e5a31685b273c304b72dea9983d14bd2836b84f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C39 10080 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.