Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f9aea8adfcb239…

MALICIOUS

PDF

52.5 KB Created: 2020-08-21 12:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b1437db0a168d8f9960ab5dc35bcb9 SHA-1: 70561a59feede9c35af19884d1f7e9f328dfb84a SHA-256: 82f9aea8adfcb239b18159f7c924c08ae63f7f4127446e6619b362315dad1974
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body also contains instructions to copy and paste content into a shell, indicating an attempt to trick the user into executing commands. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=windows+vista+bootable+iso+file
    • http://fusozojot.umbs.org/uploads/1/3/2/8/132814930/wiribonale-xabefus.pdf
    • http://zajub.paulbq.com/uploads/1/3/1/4/131454012/8780794.pdf
    • http://files.deelishbydeedi.com/uploads/1/3/2/6/132682930/zotako-neziramufowet-vuvirilog-fewunekarod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/somebody_s_watching_me_meme.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/75731780497.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/seditewagoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/marvelous_designer_8_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/41162707269.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/72907597255.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/43749326445.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/45035390982.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4444/files/harrods_brand_identity_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/4261233505.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/senudariwarul.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_off000090ae.bin
a13ba4ca733b290607d743c96ee1874a4a8601170bb1c00e599fe417f9aeba17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AE 5112 bytes
font_01_sfnt_off0000a244.bin
84a9e0f0058264b37118527239f74b5d0fc717c31f173309a5ab0447a6d2f4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA244 10088 bytes

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