Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e2a8ab7d193d59…

MALICIOUS

PDF

73.6 KB Created: 2020-08-06 18:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de232532110e13ca6f53a83de06932aa SHA-1: 6fdfe207909db74a68030109ce4407ad314577cf SHA-256: c6e2a8ab7d193d596df990781118b0874d38fcd4c940242eac820634f2474785
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=all+basic+sql+queries+commands+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient evidence for this assessment.

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=all+basic+sql+queries+commands+pdf
    • http://files.thefitnessmasters.com/uploads/1/3/1/3/131398292/vugutozos.pdf
    • http://files.sohosammy.com/uploads/1/3/2/8/132814476/wawotufidofeteze.pdf
    • http://luzelojad.rebelagainsted.org/uploads/1/3/0/7/130739678/366446.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/bijaxawitesubiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/91575897628.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/84403836992.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/kuvusolerenavixaloga.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/toshiba_satellite_recovery_disk_download_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/lejamiwinapipufatamonikig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/konovakatisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/23496734174.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/77285845914.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/dizumofoxomogujamudarabis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/99446040465.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d553.bin
7faf8d4c4048b9de7ebdae80a42c7a2daa5eff2961b2e77b6dc203476302560c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD553 5556 bytes
font_01_sfnt_off0000e816.bin
7b65083d0a86b312ae56cd86fd86e383f92a88d976650e6e17e5e8cbd8754adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 15468 bytes