Malicious PDF — malware analysis report

Static analysis result for SHA-256 1831e2003e08b9eb…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 07:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be87792d62986820dfa4bac86c332b4e SHA-1: c519f6012fc1246fa845321bccaa0afd69dd6e23 SHA-256: 1831e2003e08b9eb59e7c95a7866e17d8077ee35d7628d0e270f5b723eda8fba
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though partially obfuscated, includes the text 'Agreement on safeguards pdf' and the malicious URL, suggesting a phishing or scam attempt. The presence of a large number of external PDF links also indicates a link farm, 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.com/pify?keyword=agreement+on+safeguards+pdf
    • http://files.universalhighways.com/uploads/1/3/1/1/131163859/wisebiguki_jebojure.pdf
    • http://xomugos.rachelbrodie.net/uploads/1/3/0/7/130776603/bujir_nabefiluka_dadugamubeduji.pdf
    • http://files.kathybertone.com/uploads/1/3/1/4/131438541/dujasirowo-roxovafukop-kilamuxenukoloj-zofikaxe.pdf
    • http://files.kellergirlsbasketball.com/uploads/1/3/0/8/130814652/8745586.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/mhw_warped_feystone.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/xukuwokavewixobejorazomeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/73321111706.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/sugasorapuvasaluwigiluj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/sun_beam_grill.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/kalesawivofenejakujezob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/68367208123.pdf
    • https://cdn.shopify.com/s/files/1/0448/3507/8306/files/26135020754.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/fugudizomog.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/vutuwaguzirinorivi.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_off00005ef8.bin
fd6fd402b0522d7791486b5ea1446ff728c77c62752f6221b17775981768d796
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF8 5320 bytes
font_01_sfnt_off000070fb.bin
687a4b1da384a96c0a78e5d1094524646a6528081abf3d4469fa70926936ed70
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 10084 bytes