Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b9199633e957b6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-05 03:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6648afa8e8796017e0350f9329d9b48 SHA-1: 2b7b0819ab6f22092f3122e9bee39a08366369ef SHA-256: 63b9199633e957b68e123dc77789a987565e844a0e4ee0aa0d3bca8fa2600eca
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to lure the user to malicious infrastructure. The presence of multiple external PDF links also indicates a link farm strategy, 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=bertolt+brecht+techniques+pdf
    • http://files.littlemissmnpageant.com/uploads/1/3/0/7/130775242/caf14.pdf
    • http://files.ginigarrett.com/uploads/1/3/0/7/130740517/8472231.pdf
    • http://files.yogawithved.com/uploads/1/3/0/9/130969280/sutulewig-puzer-ginasasum-nanuresawerumux.pdf
    • http://vobuzom.bradvanambergrealestate.com/uploads/1/3/1/4/131408738/3978261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/27892099152.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/hand_warmer_terraria.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/beat_it_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/57225389984.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/gidatowozogezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/zofos.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/12431794958.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/zubobisevesij.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/xabezosebexatozig.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/dropbox_unshare_folder.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/68725680163.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/90671114318.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_off000061a9.bin
f3d1817e1e1da4627c7d9fd0ea9aac7fe03c5207229c0f96748e02b41f0f0b08
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 5348 bytes
font_01_sfnt_off000073cf.bin
3d1f9933b21e113ee863150e4168f63a5551911a4f1674c6837ced6d8b4a56e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 10120 bytes