Malicious PDF — malware analysis report

Static analysis result for SHA-256 610b97a8c12124a0…

MALICIOUS

PDF

31.6 KB Created: 2020-08-22 23:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cfa9eb4ddc1ad17a8cd7b24cac81ac5 SHA-1: 30f933f56324c2af7d048000888db09bf5066ba8 SHA-256: 610b97a8c12124a05a7e7c465d1dbb6c89c4a02aa820902622635112a7a43d8c
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=vaaste+female+ringtone', suggesting a lure for users to click on a link. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content.

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.cc/pify?keyword=vaaste+female+ringtone
    • http://files.harrisridgehomeranch.com/uploads/1/3/0/7/130776338/xaduwumudax.pdf
    • http://doduva.sailonsounds.com/uploads/1/3/0/8/130874674/ab47a950e25.pdf
    • http://resop.centralofmelbourne.com/uploads/1/3/1/6/131636655/1948216.pdf
    • https://ringtonedownloadx.com/wp-content/uploads/2019/04/Tu-Meri-Hi-To-Hai-Soniye-Tumko-Apni-Me-Ban
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/xojudanobafubadojerifegok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3177/3852/files/wapizedasotumekubufukok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/can_opening_a_on_iphone_be_harmful.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/zinomiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2407/files/pijuxirubemofenezeligetom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/labiju.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/research_analyst_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/que_es_la_basura_inorganica.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_off00004098.bin
60b2b51f5c331d578146664f3b6a6fdb8f5f4a17c0d55227cc429fe8920296d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4098 5052 bytes
font_01_sfnt_off000051b0.bin
a1491d29c8cdc0a0334af4b3fcdf6309289463bae4da77fdea555bebe0f0098d
pdf-font-stream PDF embedded font (sfnt) at offset 0x51B0 9392 bytes